Liquid organic fertiliser for aquaponics, NPK 0-0-4
Regular price
$14.00
Regular price
Sale price
$14.00
Unit price
/
per
| Packaging | Price | Price per L | vs 500 mL |
|---|---|---|---|
| 500 mL | $14.00 | $28.00 | — |
| 1 L | $19.00 | $19.00 | −32 % |
| 5 L | $75.00 | $15.00 | −46 % |
| 10 L | $132.00 | $13.20 | −53 % |
$4.66 × 3 with no fees
Klarna.
This liquid organic fertiliser with an NPK 0-0-4 formula is added directly to water containing fish. It supplies the potassium and chelated trace elements that fish waste does not provide, without destabilising the biofilter. Made in France, it is approved for use in organic farming.
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The summary
- What you receive: a bottle of organic liquid fertiliser 0-0-4, in 500 ml, 1 L, 5 L, or 10 L.
- The dose: 0.5 ml per 10 litres of water, every day, once your crops are established.
- What it supplements: the potassium and trace elements that the mineralisation of fish waste does not provide.
- How to choose: this one can be added to water containing fish; a growth fertiliser cannot.
Potassium and chelated trace elements to add to water that houses fish
This organic liquid fertiliser is designed for water that contains fish. Its NPK 0-0-4 formula provides neither nitrogen nor phosphorus, as both elements are already supplied by the mineralisation of fish waste. It supplements what your fish cannot provide, potassium and chelated trace elements, without disturbing the micro-organisms in the biofilter.
🐟 The hydroponics fertiliser and the fish
A hydroponics fertiliser supplies its nitrogen in the form of concentrated mineral salts, nitrates and often a proportion of ammonium. In a fish-free reservoir, that is exactly what is needed. In water that houses fish, ammonium is precisely the form that the biofilter bacteria oxidise into nitrite and then into nitrate, so adding it by the bottle increases the load your filter already has to nitrify from the fish waste. The nitrogen cycle describes this conversion step by step.
What the fish provides
The mineralisation of waste releases nitrogen and phosphorus, the elements plants consume most.
Both to keep an eye on
Potassium is supplied only sparingly through food, and iron precipitates as soon as pH exceeds 7.
Trace elements
Iron, manganese, zinc, copper and boron are chelated and therefore readily available to plants.
Measure iron and potassium levels before dosing
Yellowing leaves can have several causes. The iron test, which detects from 0.02 mg/L, confirms or rules out the most common deficiency. The potassium test covers the one that fish food rarely addresses. With both readings in hand, you can adjust supplementation to what your system actually consumes.
💧 Everyday dosing
The dose is 0.5 ml per 10 litres of water, every day, from the moment your crops are established. A 200-litre system therefore receives 10 ml per day, which is just over 3.6 litres over a year. Shake the container before pouring, as the organic matter settles to the bottom between uses, and pour into a well-circulated area. Two limits apply to this dose: the supplement should only be added when a recognised need exists, and the prescribed dose should not be exceeded.
Store the container between 5 and 25 °C
Store the container in a dry place, in its original sealed packaging, at a temperature between 5 and 25 °C. An unheated garden shed is therefore not suitable in winter. The product keeps for 2 years from its production date, and should be stored out of reach of children.
📦 Which size for which volume
The right size is determined by the volume of water actually in circulation, including the fish tank and sump, since the dose is calculated per litre rather than per number of plants. If your system holds 200 litres, you will use up the 500 ml bottle in 50 days and the 1 litre bottle in 100 days, at 10 ml per day. The 5 litre container covers a full season on a 500 litre system, which receives 25 ml per day. The 10 litre container is intended for installations of at least 1,000 litres, where it lasts 200 days, well within its 2-year shelf life.
Technical specifications
The formula
- Declared formula
- NPK 0-0-4No nitrogen or phosphorus — those come from the fish
- Potassium
- Potassium oxide, 4 %
- Calcium
- Calcium oxide, 1%
- Trace elements
- Iron, manganese, zinc, copper, boronAll chelated, so held in solution and readily absorbed
Dosage and use
- Dose
- 0.5 ml per 10 LEvery day, from the moment the crops are installed
- Before pouring
- Shake the containerOrganic matter settles between uses
- Storage
- Between 5 and 25 °C2 years from the production date, unopened packaging
- Certification
- Suitable for organic farmingRegulations (EU) 2018/848 and 2021/1165
Origin and use
- Manufacturing
- France
- Environment
- Indoor and outdoor
To budget for separately
- Iron monitoring
- A liquid iron test kit
- Potassium monitoring
- A potassium drop test
4 further specifications are available in the detailed view.
In the box
- 1 bottle of Aquaponic Mix in the chosen size: 500 ml, 1 L, 5 L or 10 L
Formula, guaranteed analysis, application rate, and certification recorded on 20/09/2026 from the manufacturer's website, their 2025 catalogue, and the product label. Storage: safety data sheet dated 17/01/2024.
Feed plants with or without fish in the water
Two fertilisers from the same manufacturer, two nitrogen sources
Are you torn between these two fertilisers?
One is added to water housing fish, the other feeds a nutrient solution reservoir. Three questions separate the two situations.
| Declared formula | Nitrogen source | Reference dose | Target crop | Raw materials | Price | |
|---|---|---|---|---|---|---|
| Recommended Liquid organic fertiliser for aquaponics, NPK 0-0-4Your choice | 0-0-4 | Fish waste | 0.5 ml per 10 litres, every day | Aquaponic system with fish | Of organic origin | $14.00 |
| TriPart Grow growth fertiliserYour choice | 3-1-6 | The container, in mineral form | 1,8 ml per litre during full growth | Soil-free growing without fish | Mineral salts | $10.00 |
Liquid organic fertiliser for aquaponics, NPK 0-0-4Recommended
Declared formula0-0-4
Nitrogen sourceFish waste
Reference dose0.5 ml per 10 litres, every day
Target cropAquaponic system with fish
Raw materialsOf organic origin
TriPart Grow growth fertiliser
Declared formula3-1-6
Nitrogen sourceThe container, in mineral form
Reference dose1,8 ml per litre during full growth
Target cropSoil-free growing without fish
Raw materialsMineral salts
Formulas, doses and raw materials recorded on 20/09/2026 from the manufacturer.
Help choosing
Do your plants share their water with fish?
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Liquid dispatched by tracked parcel from France. Exact shipping costs and final delivery times are displayed at checkout once your address has been entered. Outside the European Union, import duties and taxes are the responsibility of the recipient.
Frequently asked questions
6 questions
6 key questions
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Understanding
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Plant deficiencies in aquaponics, which this supplement is designed to address.
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Diagnosis
Identifying deficiencies in aquaponics
Identifying deficiencies on the leaves before adjusting dosage.
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Deficiencies
Iron deficiency in aquaponics
Iron deficiency in aquaponics, one of the trace elements involved.
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Understanding
The nitrogen cycle in aquaponics
The nitrogen cycle in aquaponics, and what the fish already contribute.
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pH
Regulating pH in an aquaponics system
pH regulation in an aquaponics system, to be monitored alongside this supplement.
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