{"title":"Water analysis","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eOur selection of water analysis kits and devices to precisely control pH, ammonia, nitrates and other essential parameters of your aquarium or pond.\u003c\/p\u003e","products":[{"product_id":"mallette-test-deau-6-en-1-aquarium","title":"6-in-1 Aquarium Water Testing Kit","description":"\u003cp\u003eThis kit brings together \u003cstrong\u003efive drop tests\u003c\/strong\u003e to measure pH, KH, ammonium, nitrite and nitrate, and an additional chart gives CO2 readings. The reagents, glassware, syringe, comparator block and colour charts are all included in the case.\u003c\/p\u003e\u003cp\u003eThe kit allows you to monitor a system day by day during start-up, then carry out routine checks on an aquarium, a pond or an aquaponic system.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Avec ammonium NH4","offer_id":53024986431811,"sku":"J2409000","price":50.9,"currency_code":"EUR","in_stock":true},{"title":"Avec fer Fe","offer_id":54904293785923,"sku":"J2409200","price":46.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/JBL_PROAQUATEST_COMBISET.png?v=1746632672"},{"product_id":"mallette-analyse-eau-14-en-1-aquarium","title":"13-in-1 water testing kit for aquariums","description":"\u003cp\u003eThe JBL \u003cstrong\u003ePROAQUATEST LAB\u003c\/strong\u003e brings together 13 drop tests in a single case and covers 12 freshwater parameters, from pH and nitrite to iron and CO2.\u003c\/p\u003e\u003cp\u003eAquarium, pond or aquaponic system, the laboratory comparator block makes the reading reliable even on tinted water. The instructions are multilingual, French included, and the reagents are available as separate refills.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53025298547011,"sku":"J2408400","price":119.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/jbl-proaquatest-lab-coffret-ferme-fond-blanc_78ee4bc9-a02b-4158-b757-96bd6ba5a94c.jpg?v=1786977992"},{"product_id":"test-fer","title":"Iron Fe water test in drops","description":"\u003cp\u003eIron is one of the first elements to run short in an aquaponic system, and its deficiency shows in the foliage. This test gives the \u003cstrong\u003etruly dissolved\u003c\/strong\u003e iron, from 0.02 to 1.5 mg\/L, in 12 minutes.\u003c\/p\u003e\u003cp\u003eThe manufacturer recommends one measurement per week after filling. Around an addition, one measurement just before and another 24 to 48 hours afterwards show you what your system really consumes.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53025430569283,"sku":"J2411600","price":16.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/ua-fe-1-boite-1600.jpg?v=1788629359"},{"product_id":"test-potassium","title":"Potassium K drop water test","description":"\u003cp\u003eFish feed provides little potassium, whereas plants consume a lot of it: in aquaponics, its level falls over successive harvests \u003cstrong\u003ewith no sign in the water\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eThis test gives the value in mg\/L, from \u003cstrong\u003e2.0 to 15\u003c\/strong\u003e, without a colour chart: you pour in the cloudy water until a printed cross disappears, and read the graduation reached.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53026692989251,"sku":"J2413000","price":22.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-potassium-boite.jpg?v=1788625558"},{"product_id":"test-magnesium","title":"Magnesium water test in drops, freshwater","description":"\u003cp\u003eThis drop-based test measures \u003cstrong\u003emagnesium\u003c\/strong\u003e from \u003cstrong\u003e0 to 10 mg\/L\u003c\/strong\u003e in freshwater, whether in a planted aquarium or in aquaponics. Magnesium is the central atom of chlorophyll, and a plant deficient in it will yellow between the veins.\u003c\/p\u003e\u003cp\u003eAn iron deficiency produces the same yellowing, but it starts with the young leaves, whereas a magnesium deficiency starts with the lower leaves.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53039635661123,"sku":"J2414200","price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-magnesium-eau-douce-boite_3d410045-4a6e-4165-b60f-008c1d7a11c9.jpg?v=1788625379"},{"product_id":"test-phosphates","title":"PO4 phosphate water test, drop-based","description":"\u003cp\u003eThis colorimetric test measures \u003cstrong\u003ephosphate PO4\u003c\/strong\u003e by drops, using a comparator block and a reference sample, for aquariums, ponds, and aquaponics. The scale starts at 0.05 mg\/L, the range where the useful thresholds fall.\u003c\/p\u003e\u003cp\u003ePhosphate feeds both plants and algae, and should be read alongside \u003cstrong\u003enitrate\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Aquarium","offer_id":53039870640451,"sku":"J2412700","price":15.9,"currency_code":"EUR","in_stock":true},{"title":"Bassin à koïs, sur commande","offer_id":54904365384003,"sku":"J2407600","price":15.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/ua-po4-1-boite_d2f08131-ea5b-4144-9f9a-b848f3802344.jpg?v=1788623057"},{"product_id":"test-nitrates","title":"Nitrate NO3 water test in drops","description":"\u003cp\u003eThis drop-based colorimetric test measures \u003cstrong\u003enitrate NO3\u003c\/strong\u003e in aquariums, ponds, and aquaponic systems, using a colour comparator block and a reference sample. In freshwater, the recommended value should remain below 30 mg\/L.\u003c\/p\u003e\u003cp\u003eNitrate is the final stage of the nitrogen cycle: a waste product to dilute in an aquarium, and a \u003cstrong\u003enitrogen feed\u003c\/strong\u003e for crops in aquaponics.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040159850819,"sku":null,"price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/ua-no3-1.jpg?v=1788620156"},{"product_id":"test-cuivre","title":"Copper Cu water test in drops","description":"\u003cp\u003eCopper is tested to confirm it is \u003cstrong\u003eabsent\u003c\/strong\u003e from the water: at doses a fish can tolerate, it kills your shrimps, snails, and freshwater shrimps.\u003c\/p\u003e\u003cp\u003eThis test measures dissolved copper in fresh water, ponds, and salt water, using a colour comparator block that cancels out the natural tint of your water.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040290890051,"sku":"J2411400","price":16.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/ua-cu-1-boite_4bcc5311-2759-49aa-b705-485b7151faf4.jpg?v=1788625937"},{"product_id":"test-ammonium","title":"Ammonium NH4 water test in drops","description":"\u003cp\u003eThis test tells you whether your biological filtration is still doing its job. It measures ammoniacal nitrogen from \u003cstrong\u003e0.05 to 5 mg\/L\u003c\/strong\u003e, in freshwater, pond and aquaponic systems.\u003c\/p\u003e\u003cp\u003eA single figure is not enough to make a decision: it is your \u003cstrong\u003epH\u003c\/strong\u003e that determines the genuinely toxic fraction, and the same result can be harmless or critical depending on it.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040335323459,"sku":"J2412100","price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-ammonium-nh4-boite_ab17517f-8069-4eec-aa57-cf7d8beed52f.jpg?v=1788611544"},{"product_id":"test-durete-totale","title":"GH total hardness water test in drops","description":"\u003cp\u003eTotal hardness measures the dissolved calcium and magnesium, in other words what your water \u003cstrong\u003eprovides\u003c\/strong\u003e to living things. It is read by titration, counting drops until the colour turns from red to green, in 2 minutes.\u003c\/p\u003e\u003cp\u003eThis value determines how strong a shrimp's carapace and a snail's shell will be, as well as part of a fish's mineral balance.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040436937027,"sku":null,"price":9.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-durete-totale-gh-boite_ab2c215d-f159-4407-9137-d19d6cb165da.jpg?v=1788622846"},{"product_id":"test-nitrite","title":"Nitrite NO2 water test in drops","description":"\u003cp\u003eNitrite is, along with ammonia, one of the two toxic compounds in a new tank. It appears after the ammonium, when the first family of bacteria is already active and the second is not yet established, and it blocks the transport of oxygen in your fish's blood.\u003c\/p\u003e\u003cp\u003eThis test measures it from \u003cstrong\u003e0.025 to 1 mg\/L\u003c\/strong\u003e after 5 minutes, across nine colour fields, in freshwater as in seawater.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040640688451,"sku":null,"price":13.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-nitrite-no2-boite_968b5032-da43-4d76-b6a5-767c3b56a18d.jpg?v=1788620413"},{"product_id":"test-durete-carbonatee","title":"KH carbonate hardness water test in drops","description":"\u003cp\u003eCarbonate hardness is the \u003cstrong\u003ebuffering capacity\u003c\/strong\u003e of your water — its ability to neutralise acidification without the pH fluctuating. This test measures it in aquariums, ponds, and aquaponics systems.\u003c\/p\u003e\u003cp\u003eThe measurement is done by titration: you count the drops until the colour changes from blue to orange-yellow, and each drop equals 1 °dKH.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040651141443,"sku":null,"price":9.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-durete-carbonatee-kh-boite_f9f83a7d-309a-463a-afb6-d919a3be4368.jpg?v=1788620095"},{"product_id":"test-oxygene","title":"Dissolved oxygen water test in drops","description":"\u003cp\u003eA lack of oxygen can kill the fish in a pond in a single summer night. This test measures the actual dissolved oxygen, from \u003cstrong\u003e1 to 10 mg\/L\u003c\/strong\u003e, in aquariums, ponds, and aquaponics systems.\u003c\/p\u003e\u003cp\u003eThe difficulty lies in the \u003cstrong\u003esampling\u003c\/strong\u003e: the test tube must be filled by immersion, to the brim, and the slightest trapped bubble will skew the result upwards.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53040670474563,"sku":null,"price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-oxygene-o2-boite_f6ca4d1a-07d6-4e6e-adbd-525854c74126.jpg?v=1788622865"},{"product_id":"test-potentiel-hydrogene","title":"pH drop test kit","description":"\u003cp\u003eThis test gives the pH from \u003cstrong\u003e3.0 to 10.0\u003c\/strong\u003e by colour reading, in fresh water, in ponds and in aquaponics.\u003c\/p\u003e\u003cp\u003eThe reading should be taken alongside the carbonate hardness, or \u003cstrong\u003eKH\u003c\/strong\u003e, which stabilises the pH, and with the time of measurement in mind, since the pH of a planted tank varies throughout the day.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"pH 3,0 à 10,0","offer_id":53046825320771,"sku":"J2410100","price":9.9,"currency_code":"EUR","in_stock":true},{"title":"pH 6,0 à 7,6","offer_id":54904290509123,"sku":"J2410300","price":11.5,"currency_code":"EUR","in_stock":true},{"title":"pH 7,4 à 9,0","offer_id":54904290541891,"sku":"J2410500","price":12.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/test-eau-ph-boite-3-10_b3af0b9c-a673-470e-9bf7-e8d340f1f1c0.jpg?v=1788619762"},{"product_id":"test-dioxyde-carbone-co2","title":"Dissolved CO2 water test in drops","description":"\u003cp\u003eDissolved CO2 feeds your plants, but in excess it interferes with your fish's ability to breathe. This test gives you the result \u003cstrong\u003edirectly in mg\/L\u003c\/strong\u003e: count the drops of the second reagent until the colour shifts to pink, and each drop represents 2 mg\/L.\u003c\/p\u003e\u003cp\u003eThe alternative method — the table that cross-references pH and KH — assumes that the acidity of your water comes from carbon dioxide. A titration makes no such assumption.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":53128933769539,"sku":"","price":13.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/ua-co2-1-boite_22e05a8f-c78e-42b1-a4da-7ff0407cc611.jpg?v=1788622429"},{"product_id":"galet-effervescent-anti-algues-all-in-one","title":"Anti-algae effervescent pebble : All In One BioActif","description":"\u003cp\u003eThe effervescent tablet \u003cstrong\u003eAll In One BioActif\u003c\/strong\u003e is manufactured by Aquatic Science, which markets it under the name Balance Tab. Placed in the filter, the skimmer or directly in the water, it slowly releases bacterial spores, an anti-phosphate agent and minerals: it speeds up sludge reduction, maintains GH and KH, and stabilises the pH of a garden pond of up to 5,000 litres.\u003c\/p\u003e\u003cp\u003eIt is a background maintenance product, not a curative algicide: the manufacturer states that it is \u003cstrong\u003enot suitable for correcting water that is already out of balance\u003c\/strong\u003e. Aquatic Science publishes no guidance on use in aquaponics or on edible plants.\u003c\/p\u003e","brand":"Aquatic Science","offers":[{"title":"Unit","offer_id":53302641000771,"sku":"KIDAIO250","price":8.5,"currency_code":"EUR","in_stock":true},{"title":"Set of 6","offer_id":53302641033539,"sku":"","price":45.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Galet_effervescent_all_in_One_Bioactif.png?v=1749896371"},{"product_id":"recharge-test-ph","title":"Reagent refill for pH test, three ranges","description":"\u003cp\u003eThis bottle is the reagent for the \u003ca href=\"\/en-anz\/products\/test-potentiel-hydrogene\"\u003epH test\u003c\/a\u003e, sold separately. Use the selector to choose the range of your test kit — \u003cstrong\u003e3.0 to 10.0\u003c\/strong\u003e, 6.0 to 7.6, or 7.4 to 9.0 — as it is the colour chart that interprets the result you obtain: approximately \u003cstrong\u003e50 readings\u003c\/strong\u003e on the wide range, 80 on the narrow range.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"pH 3.0 to 10.0","offer_id":54071991173443,"sku":"J2410200","price":5.8,"currency_code":"EUR","in_stock":true},{"title":"pH 6.0 to 7.6","offer_id":54071991206211,"sku":"J2410400","price":5.8,"currency_code":"EUR","in_stock":true},{"title":"pH 7.4 to 9.0","offer_id":54071991238979,"sku":"J2410600","price":6.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_potentiel_hydrogene_2.png?v=1767987190"},{"product_id":"recharge-test-kh","title":"Reagent refill for KH carbonate hardness test","description":"\u003cp\u003eThis bottle is the titration reagent for the \u003ca href=\"\/en-anz\/products\/test-durete-carbonatee\"\u003ecarbonate hardness test\u003c\/a\u003e, sold separately. You add it drop by drop to \u003cstrong\u003e5 ml\u003c\/strong\u003e of water until the colour changes from blue to orange-yellow.\u003c\/p\u003e\u003cp\u003eThe number of drops added gives the result directly, at a rate of \u003cstrong\u003e1 °dKH\u003c\/strong\u003e per drop. The test tube from your kit remains in use, and there is no colour chart to replace with a titration method.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54057417867587,"sku":"J2411100","price":5.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_duretee_carbonatee.png?v=1767987233"},{"product_id":"recharge-test-gh","title":"Reagent refill for total hardness GH test","description":"\u003cp\u003eThis bottle is the titration reagent for the \u003ca href=\"\/en-anz\/products\/test-durete-totale\"\u003etotal hardness test\u003c\/a\u003e, sold separately. It measures the calcium and magnesium in your water as a single combined value.\u003c\/p\u003e\u003cp\u003eYou add it drop by drop into \u003cstrong\u003e5 ml\u003c\/strong\u003e of water until the colour changes from red to green, with each drop equalling \u003cstrong\u003e1 °dGH\u003c\/strong\u003e. The test tube and sampling syringe from your kit remain in use.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54057423176003,"sku":"J2410900","price":5.8,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_duretee_totale.png?v=1767987255"},{"product_id":"recharge-test-o2-ed-em","title":"Reagent refill for dissolved oxygen test","description":"\u003cp\u003eThese three bottles are the reagents for the \u003ca href=\"\/en-anz\/products\/test-oxygene\"\u003edissolved oxygen test\u003c\/a\u003e, providing approximately \u003cstrong\u003e40 measurements\u003c\/strong\u003e. Each measurement uses 6 drops from each of the three bottles.\u003c\/p\u003e\u003cp\u003eThe method fixes the oxygen in the test tube at the moment of sampling, then reveals it through a colour reaction. The glass test tube, its screw cap, the syringe, and the colour chart from your kit remain in use throughout.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54071994450243,"sku":"J2411300","price":9.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_oxygene_O2.png?v=1767986897"},{"product_id":"recharge-test-cu","title":"Reagent refill for copper Cu test","description":"\u003cp\u003eThese two bottles contain the reagents for the \u003ca href=\"\/en-anz\/products\/test-cuivre\"\u003ecopper test\u003c\/a\u003e, sufficient for approximately \u003cstrong\u003e50 measurements\u003c\/strong\u003e. They measure only the copper that remains dissolved in the water — the form that affects your livestock.\u003c\/p\u003e\u003cp\u003eOutside of treatment, levels should stay below \u003cstrong\u003e0.05 mg\/L\u003c\/strong\u003e, and readings are taken by comparing two samples in the comparator block. The test tubes, sampling syringe, comparator block, and colour chart from your kit remain in use.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54072002576707,"sku":"J2411500","price":8.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_cuivre_Cu.png?v=1767986506"},{"product_id":"recharge-test-fe","title":"Reagent refill for iron Fe test","description":"\u003cp\u003eThis dropper bottle is the reagent for the \u003ca href=\"\/en-anz\/products\/test-fer\"\u003eiron test\u003c\/a\u003e, giving approximately \u003cstrong\u003e50 measurements\u003c\/strong\u003e. It colours only the iron remaining in solution — the iron your plants can actually take up.\u003c\/p\u003e\u003cp\u003eThe reading ranges from \u003cstrong\u003e0.02 to 1.5 mg\/L\u003c\/strong\u003e across nine steps. The two test tubes, the syringe, the comparator block, and the colour chart from your test kit remain in use.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54072011751747,"sku":"J2411700","price":10.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/Recharge_test_eau_fer_FE.png?v=1767986656"},{"product_id":"recharge-test-nh4","title":"Reagent refill for NH4 ammonium test","description":"\u003cp\u003e\u003cstrong\u003eAmmonia\u003c\/strong\u003e is the first waste product in an inhabited water system, and the fastest indicator that biological filtration is struggling. These three bottles are the reagents for the \u003ca href=\"\/en-anz\/products\/test-ammonium\"\u003eammonia test\u003c\/a\u003e, in the same volume as those in the original kit.\u003c\/p\u003e\u003cp\u003eApproximately \u003cstrong\u003e50 tests\u003c\/strong\u003e — enough to monitor a full cycle start-up at one test per day. Your existing glassware, comparator block, and colour chart remain in use.\u003c\/p\u003e","brand":"JBL","offers":[{"title":"Default Title","offer_id":54072018469187,"sku":null,"price":9.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/recharge-test-nh4-boite.jpg?v=1788777328"},{"product_id":"recharge-test-n02","title":"Reagent refill for NO2 nitrite test","description":"\u003cp\u003eThis refill contains the \u003cstrong\u003etwo reagent bottles\u003c\/strong\u003e for the nitrite NO2 test, numbered 1 and 2, along with an illustrated instruction leaflet, for approximately \u003cstrong\u003e50 tests\u003c\/strong\u003e. The chemistry and number of tests are identical to those of the original kit.\u003c\/p\u003e\u003cp\u003eNitrite is the parameter tested most regularly — daily during the initial fill, then weekly thereafter. You reuse the glassware, sampling syringe, and colour chart from your \u003ca href=\"\/en-anz\/products\/test-nitrite\"\u003enitrite test\u003c\/a\u003e, all of which last for years.\u003c\/p\u003e","brand":"Hardy Dewerse","offers":[{"title":"Default Title","offer_id":54072020992323,"sku":"J2412400","price":6.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0939\/6410\/8099\/files\/recharge-test-no2-boite_8b910fc2-db25-48ff-bf21-3ec8da0cdc14.jpg?v=1788778652"},{"product_id":"recharge-test-n03","title":"Reagent refill for nitrate NO3 test","description":"\u003cp\u003eThese two bottles — one powder and one drops — are the reagents for the \u003ca href=\"\/en-anz\/products\/test-nitrates\"\u003enitrate test kit\u003c\/a\u003e, providing approximately \u003cstrong\u003e40 measurements\u003c\/strong\u003e. Readings cover a range of 0.5 to 200 mg\/L.\u003c\/p\u003e\u003cp\u003eIn aquaponics, this parameter plays two roles: it's a waste product to keep in check, and the form of nitrogen your plants feed on. 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