TriPart Starter Kit: 3 x 500 ml Terra Aquatica hydroponics fertiliser

TriPart application chart for hydroponics and coco fibre

TriPart application chart for soil growing

Three-part hydroponics fertiliser kit, for soft or hard water

Name: Three-part hydroponics fertiliser kit, for soft or hard water
Brand: Terra Aquatica
SKU: TA-KIT-SW
Availability: InStock

21,90 €

~~30,60 €~~ 21,90 €

7,30 € × 3 with no fees Klarna.

The three parts of the TriPart fertiliser system, Grow, Micro and Bloom, cover a complete crop from seedling to harvest, in hydroponics, on coco fibre or in soil. The 500 ml kit adds a 25 g sachet of powdered pH-, and the 1 L and 5 L sets bring together the three bottles, in a soft water or hard water version.

Ref. TA-KIT-SW·Hydroponic fertiliser

Format : Kit 3 x 500 ml and ph-

Kit 3 x 500 ml and pH-

Pack of 3 x 1 L

Pack of 3 x 5 L

Version : Freshwater

Freshwater

Hard water

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The summary

What you receive: Grow, Micro and Bloom in 500 ml bottles with 25 g of powdered pH- in the kit, or in 1 L or 5 L containers in the bundles.
Which version: soft water below 70 mg of calcium per litre, hard water above. It is the only element that differs between the two versions.
What it allows: running a complete crop, from seedling to harvest, without buying anything else for nutrition.
How much solution: enough to prepare several hundred litres depending on the stage. The calculator gives the details.
Better value: the kit costs less than its three bottles bought separately, and each bundle costs less than its three containers.
Shipping: 2.1 kg for the kit, about 3.6 kg for the 1 L bundle and 18 kg for the 5 L bundle.

Grow, Micro and Bloom together, as a 500 ml kit or in 1 L and 5 L lots

The TriPart Starter Kit contains the three fertilisers of the TriPart system in 500 ml bottles, along with a 25 g sachet of powdered pH adjuster. The 500 ml size comfortably covers your first complete crop, from seedling to harvest, in hydroponics, in coco fibre and in soil.

🧴 The role of each bottle

The three bottles are not interchangeable: each one carries part of the elements, and the solution is only complete once all three have been added to the same water. Grow and Bloom are set apart by their dominant element, nitrogen for the first and phosphorus for the second, while Micro supplies what neither of the other two contains. Their different colours let you tell each bottle apart when dosing, without rereading the label.

Grow, the green one

It supplies the nitrogen and potassium of the vegetative phase. Dominant during growth, it fades out at flowering. Its formula is NPK 3-1-6.

Micro, the brown one

It supplies calcium, iron and trace elements, present at every stage. It is the one that comes in a soft water and a hard water version. Its formula is NPK 5-0-1.

Bloom, the pink one

It provides phosphorus, potassium, magnesium and sulphur. The dose goes up when the plant moves on to flowers and fruit. Its formula is NPK 0-5-4.

Adjusting the feed never means changing product, only changing the proportions. At first roots, you pour all three at 0.5 ml per litre. In full growth, the Grow dose goes up to 1.8 while the Bloom dose drops back to 0.6. In flowering, it is the reverse: Bloom at 2.4, Grow at 0.8. The Micro stays present at every stage, between 0.5 and 2 ml per litre, since it is the one that carries the calcium and iron. In soil, the doses are lower, especially in the early stages: 0.2 ml per litre of each part at first roots instead of 0.5, then 1.5 ml of Grow instead of 1.8 in growth.

Check the pH of every solution you prepare

The pH- sachet in the kit lowers the pH, but only a measurement tells you by how much to correct it. The pH drop test from the same range reads from 4.0 to 8.5 on a colour chart, and its 30 ml bottle gives about 500 measurements. You use it with each new solution, once the three bottles have been poured in, to aim for 5.5 to 6.5 until growth and then 6.4 to 6.8 from pre-flowering.

Pour in each bottle separately

Add each bottle separately to the water, stirring, and rinse the measuring cup between each one. Two concentrates brought into direct contact will precipitate: the calcium in the Micro and the phosphorus in the Bloom form a deposit that sinks to the bottom and can no longer be absorbed. The Micro bottle also carries the H318 hazard statement, serious eye damage: wear goggles and gloves when dosing it. Adjust the pH last, once all three have been added.

The version of the kit is chosen according to the water you use, and it is the only bottle of Micro that differs between the two. The benchmark is 70 mg of calcium per litre: below that, the soft water version; above it, the hard water version, which contains less calcium since your water already supplies some. Reverse osmosis water or rainwater therefore calls for the soft water version. The annual analysis from your water supplier gives this value. For a soil crop, which is already rich in calcium, the hard water version is the better choice.

📉 The bottle that runs down

If you prepare the same volume of solution at each of the five stages, each litre of reservoir uses 6.1 ml of Grow, 6.3 ml of Micro and 6.0 ml of Bloom over the whole cycle. At this rate, 500 ml of Micro is enough for a reservoir of about 79 litres changed at every stage, against 82 litres for Grow and 83 for Bloom. The Micro bottle is therefore the first to run out, because it stays dosed at a steady level from the start to the end of the cycle.

📦 One kit and two lots

The 500 ml kit is for discovering the system, and its 79 litres of solution over a full cycle correspond to a first tank for the living room. The 3 x 1 L pack doubles this capacity, to nearly 160 litres, and suits an ebb-and-flow table or a few pots with a reservoir. The 3 x 5 L pack covers roughly 790 litres: a reservoir of that size renewed at each of the five stages, or nearly 40 renewals of a 100-litre reservoir, which is about 18 months of growing at one renewal every 2 weeks. Each pack contains the three bottles in the same size and costs less than buying those three bottles separately, which leaves you free to choose the size according to the volume of your set-up.

🔁 Reordering after the kit

The first bottle to buy again is the Micro, in the version that matches your water: soft water for reverse osmosis water, rainwater or water low in limestone, hard water for the tap water of most regions. The second depends on what you grow: with lettuces, spinach and herbs, it is the TriPart Grow that runs out; with tomatoes, strawberries and peppers, it is the TriPart Bloom. There is no need to reorder all three at the same time or in the same size. The 25 g sachet of powdered pH- covers your first preparations; after that, the liquid pH- is dosed drop by drop into the solution. To lay the groundwork before you start, the indoor hydroponics guide covers the set-up of a first tank.

Technical specifications

The three parts and the pH corrector

TriPart Grow: NPK 3-1-6Nitrogen, potassium and magnesium for the vegetative phase.
TriPart Micro: NPK 5-0-1Calcium, iron and trace elements. Soft water or hard water version.
TriPart Bloom: NPK 0-5-4The phosphorus, potassium, magnesium and sulphur needed for flowering.
pH corrector: 25 g of pH- powderSachet included in the 500 ml kit, for your first preparations.
Order of pouring: Separately, in the waterNever one concentrate into another. Rinse the dosing cup between each bottle.
Target pH: 5.5 to 6.5Up to the growth stage, then 6.4 to 6.8 from pre-flowering.

To budget for separately

Goggles and gloves: For the Micro bottleThe only bottle classified H318, causes serious eye damage.
Measuring pH and conductivity: Test kit or meterpH is adjusted last: without a measurement, the correction is made blindly.
Water hardness test: Calcium measurementIt tells you whether the soft water version or the hard water version suits you.
Graduated measure: Accurate to the millilitreOne doser per bottle avoids rinsing between each addition.

2 further specifications are available in the detailed view.

In the box

1 bottle of TriPart Grow, 500 ml, 1 L or 5 L depending on the size chosen.
1 bottle of TriPart Micro in the same size, in soft water or hard water version.
1 bottle of TriPart Bloom in the same size.
1 sachet of 25 g of pH- corrector powder in the 500 ml kit.

Kit and bundle contents: brand's shop, checked on 07/10/2026. NPK formulas: bottle labels; doses and pH ranges: 2025 application chart. Micro H318 statement: safety data sheet dated 25/07/2024.

What each of the three bottles in the kit does

The kit contains all three, and it is the ratio between them that changes over the course of the cycle. This table shows which one dominates at what point, and which one calls for safety glasses.

The kit contains all three, and they do not run out at the same time The same box lasts three months for one grower and six for another. This table tells you which bottle you will reorder on its own.

	Total nitrogen (%)	Phosphorus, P2O5 (%)	Potassium, K2O (%)	Supplies calcium and iron	It is the one that changes between the two versions of the kit	First roots (ml/L)	Full growth (ml/L)	Pre-flowering (ml/L)	Flowering (ml/L)	Present at a high dose at every stage	Classified hazardous	Safety glasses required when measuring	Bottle colour
TriPart GrowYour choice	3 %	1 %	6 %	No	No	0,5 ml/L	1,8 ml/L	2 ml/L	0,8 ml/L	No	No	No	Green
TriPart MicroYour choice	5 %	0 %	1 %	Yes	Yes	0,5 ml/L	1,2 ml/L	2 ml/L	1,6 ml/L	Yes	Yes	Yes	Dark brown
TriPart BloomYour choice	0 %	5 %	4 %	No	No	0,5 ml/L	0,6 ml/L	1,5 ml/L	2,4 ml/L	No	No	No	Pink

TriPart Grow

Formula declared on the label

Total nitrogen (%)3 %

Phosphorus, P2O5 (%)1 %

Potassium, K2O (%)6 %

Supplies calcium and ironNo

It is the one that changes between the two versions of the kitNo

Hydroponic dosage, millilitres per litre

First roots (ml/L)0,5 ml/L

Full growth (ml/L)1,8 ml/L

Pre-flowering (ml/L)2 ml/L

Flowering (ml/L)0,8 ml/L

Use and safety

Present at a high dose at every stageNo

Classified hazardousNo

Safety glasses required when measuringNo

Bottle colourGreen

TriPart Micro

Formula declared on the label

Total nitrogen (%)5 %

Phosphorus, P2O5 (%)0 %

Potassium, K2O (%)1 %

Supplies calcium and ironYes

It is the one that changes between the two versions of the kitYes

Hydroponic dosage, millilitres per litre

First roots (ml/L)0,5 ml/L

Full growth (ml/L)1,2 ml/L

Pre-flowering (ml/L)2 ml/L

Flowering (ml/L)1,6 ml/L

Use and safety

Present at a high dose at every stageYes

Classified hazardousYes

Safety glasses required when measuringYes

Bottle colourDark brown

TriPart Bloom

Formula declared on the label

Total nitrogen (%)0 %

Phosphorus, P2O5 (%)5 %

Potassium, K2O (%)4 %

Supplies calcium and ironNo

It is the one that changes between the two versions of the kitNo

Hydroponic dosage, millilitres per litre

First roots (ml/L)0,5 ml/L

Full growth (ml/L)0,6 ml/L

Pre-flowering (ml/L)1,5 ml/L

Flowering (ml/L)2,4 ml/L

Use and safety

Present at a high dose at every stageNo

Classified hazardousNo

Safety glasses required when measuringNo

Bottle colourPink

Formulas taken from the bottle labels, doses from the application chart, hydroponics and coco fibre column. The sachet of powdered pH adjuster in the kit does not appear in this chart. Values recorded on 10 September 2026.

Documents & manuals

TriPart application chart, hydroponics, coco and soil, multilingual document

The official stage-by-stage chart, in millilitres per litre for the three parts of the kit, with the conductivity and pH ranges to aim for. Multilingual document, French and English side by side.

PDF · 4

Download

Safety data sheet for the Micro bottle, in French

Version 9 of 25 July 2024, for the soft water version. It is the only one of the three bottles classified as hazardous, with the H318 statement and the requirement to wear safety glasses.

PDF · 4

Download

Safety data sheet for the Grow bottle, in French

Version 8 dated 25 July 2024. This bottle is not classified as hazardous: only the precautionary statements P101 and P102 appear on the label.

PDF · 4

Download

Safety data sheet for the Micro freshwater bottle, in English

Version 9 dated 25 July 2024, same content as the French data sheet: H318 classification, declared composition and mandatory eye protection during dosing. Document in English.

PDF · 4

Download

Safety data sheet for the Micro hard water bottle, in English

Version 9 of 25 July 2024, for the hard-water version of the kit, the one supplied if you grow on limescale-rich tap water. Same H318 classification. Document in English.

PDF · 4

Download

Safety data sheet for the Grow bottle, in English

Version 8 of 25 July 2024. This bottle is not classified as hazardous: only the precautionary statements P101 and P102 appear on the label. Document in English.

PDF · 4

Download

Safety data sheet for the Bloom bottle, in English

Version 7 of 26 December 2023, for the third bottle in the kit. Product not classified as hazardous, with the same precautionary statements P101 and P102. Document in English.

PDF · 4

Download

Estimate your
delivery time

Parcel of 2.1 kg for the kit, around 3.6 kg for the 1 L pack and 18 kg for the 5 L pack, dispatched tracked from France. None of the components is classed as dangerous goods for transport. The exact costs and delivery times are shown in the basket once the address has been entered. Outside the European Union, import duties and taxes are payable by the recipient.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

Soft water or hard water: which one should you choose?

Look at the calcium content of your water in your water supplier's annual analysis.

Your water	Calcium	Version
Reverse osmosis or rainwater	close to 0	Soft water
Tap water, granite region	below 70 mg/L	Soft water
Tap water, limestone region	above 70 mg/L	Hard water

Only the Micro bottle differs between the two versions. The Grow, the Bloom and the pH- sachet are identical. If you choose the wrong one, the solution gradually drifts away from its calcium balance, towards excess or towards deficiency, and the next bottle can be bought in the right version.

Is it cheaper than buying the bottles separately?

How long does a kit last?

It depends on the size of your reservoir, not on the length of the crop. At the starting doses, 0.5 ml per litre for all three, a 500 ml bottle covers about 1,000 litres of solution, but the doses then increase.

500 ml bottle	Growth dose	Litres covered	Flowering dose	Litres covered
TriPart Grow	1.8 ml/L	277 L	0.8 ml/L	625 L
TriPart Micro	1.2 ml/L	416 L	1.6 ml/L	312 L
TriPart Bloom	0.6 ml/L	833 L	2.4 ml/L	208 L

These are the hydroponic and coco fibre doses from the feeding chart. For soil, its dedicated column reduces them by 12.5 to 60% depending on the stage, with the biggest reduction in the early stages. On a 20 to 50 litre tank renewed every 2 weeks, one kit comfortably sees a full crop through.

Is the included pH adjuster enough?

To get started, yes. To last, no, especially in hard water, where the first corrections use a lot of product.

The 25 g sachet is there so that you do not have to buy a fourth product on the first day. After that, the liquid pH- is dosed to the drop, directly into the solution. This sachet lowers the value: to raise it, you need a pH+, which the kit does not contain, and it is the pH- and pH+ duo that covers both directions. On osmosis or rain water, it is usually the pH+ that gets used most.

In what order should you pour the three bottles?

Fill the reservoir with room-temperature water.
Add the Micro, mix, and rinse the doser.
Add the Grow, mix, and rinse the doser.
Add the Bloom and mix.
Measure, then adjust the pH last.

Never pour a concentrate directly into another: the calcium in the Micro and the phosphorus in the Bloom then form an insoluble deposit, and part of what you paid for ends up at the bottom.

The full application table gives the details stage by stage, for hydroponics, coco fibre and soil.

Why does one of the bottles carry a hazard warning?

Is it suitable for a beginner?

Yes, provided you have something to measure with. The kit supplies complete nutrition, but you will need a pH meter or a drop test: without measuring, the pH of the solution is corrected blind.

It can be used just as well in hydroponics as on coco fibre and in soil, using the lower doses from the soil column of the application table, particularly in the early stages. That is, incidentally, a good way to begin: trying the kit on a few pots before equipping a full soilless installation. In aquaponics, on a system without fish or on a decoupled loop, it is used as in hydroponics; on a stocked pond, the waste already supplies the nitrogen and it is rather iron, potassium and calcium that are lacking, a case for which Aquaponic Mix is formulated.

What should I buy when the kit runs out?

If all three bottles run out at the same rate, the 3 x 1 L or 3 x 5 L set, offered as a variant of this kit, replaces them in a single order. Otherwise, buy them again one at a time, in whichever size suits you: Grow, Micro soft water or Micro hard water, and Bloom. From the 1 L size upwards, the price per litre becomes much more attractive, and buying separately lets you choose different sizes depending on what you use most: on leafy crops, the Grow runs out first; on fruiting crops, it is the Bloom.

Adding a fertiliser from another brand is not forbidden, but the system is designed to be complete on its own, and stacking products means doubling up on elements that are already present while losing track of your settings. The supplements that still make sense are those that bring something different: a root stimulant, a silica supplement, or a targeted corrector such as chelated iron if your water locks up iron.

How much solution you get with this kit

Enter the volume of your reservoir. The calculator gives the quantity of each of the three parts to add at the start-up stage, where they are dosed identically.

Reservoir water volume

5 L500 L

0ml

of each of the three parts, at the first-roots stage

At the first true leaves, always all three identical

0 ml

These two stages are the only ones where the three parts are dosed identically, which makes them easy to calculate. After that the proportions diverge: in growth, 1.8 ml of Grow, 1.2 of Micro and 0.6 of Bloom per litre; in flowering, 0.8 of Grow, 1.6 of Micro and 2.4 of Bloom. In soil, use the dedicated column of the table: 0.2 ml per litre of each part at the first roots, then 1.5 / 1 / 0.5 in growth and 0.7 / 1.4 / 2.1 in flowering.

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Three-part hydroponics fertiliser kit, for soft or hard water

The summary