Anti-phosphate treatment for garden ponds

$24.00

Format	Prix	Prix au L	vs 0.5 L
0.5 L	$24.00	$48.00	—
1 L	$47.00	$47.00	−2 %

This liquid treatment permanently binds dissolved phosphates in a garden pond, depriving algae of one of their key resources.

The dose is determined by a test reading: 10 to 50 ml per cubic metre depending on the level measured, with a minimum of ten days between treatments.

Format : 0.5 l

0.5 L

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Payment in instalments, free of charge

The summary

What you receive: a bottle of liquid treatment, 0.5 litre or 1 litre, ready to pour.
What it does: it permanently binds dissolved phosphates, which are one of the resources that algae depend on.
Dosage: 10 to 50 ml per cubic metre depending on the measured level, with a minimum of 10 days between treatments.
What you need first: a phosphate test, because the dose is derived from the reading and nothing else.
Half a litre or one litre: one litre binds 3 mg/L of phosphate in 50 cubic metres of water.
Shipping: small parcel, can be grouped at no extra cost with the rest of your order.

Liquid treatment that binds dissolved phosphates in an ornamental pond

Phosphates are a fertiliser, and in a garden pond it is algae that benefit from them. This liquid binds them durably, cutting off the food supply in water that keeps turning green. One litre fixes 3 mg per litre of phosphate in 50 cubic metres of water, and the exact dose is calculated from your measured reading.

🧪 Measure before dosing

The dose for this treatment cannot be calculated on volume alone. The range runs from 10 to 50 ml per cubic metre, and where you land within that range depends on the phosphate level measured in your water. Without a measurement, you are choosing at random between the lowest and highest dose, a fivefold difference. The drop-based phosphate test gives you a reading in about twelve minutes and can be repeated 10 days later to track progress. Also make sure your filtration is in good working order before dosing, as it is the filtration that will subsequently remove the bound material.

The feed

What the fish do not eat breaks down and releases phosphates into the water.

The leaves

A layer of leaves left on the bottom releases nutrients for months as it decomposes.

Top-up water

Mains or rainwater brings its own load, which varies depending on the location.

📉 10 days between visits

The minimum interval between two treatments is 10 days, as that is how long it takes for fixation to occur and for a new measurement to be meaningful. Adding more after 3 days because the water is still green fixes nothing further, the colour of the water follows the algae already present, not the current phosphate level. That algae will in any case take several weeks to disappear once its source has been cut off, and that is the only thing this product promises.

The test that makes this bottle worthwhile

Pick up the phosphate test alongside the bottle: it turns a dosage range into a precise amount and tells you 10 days later whether a second treatment is warranted. If your water is green but phosphates aren't the cause, the article on green pond water covers the other possibilities, starting with light levels and fish load.

Treat the cause before the symptom

A bottle of anti-phosphate treatment fixes nothing if the source of the problem remains, and this is the observation that comes up most often after a first purchase. Remove leaves before they decompose, feed more precisely, and check your top-up water, some water companies add phosphates to the mains supply to protect pipework. A pond that needs treating every month throughout an entire season is a pond whose source has not been identified.

🌿 For ornamental ponds only

The phosphorus this product removes from the water is a key plant nutrient. In an ornamental pond, removing it is precisely the aim. In an aquaponic system feeding edible crops, the logic is reversed: you would be depriving your plants of an element they need, and the first signs appear on the foliage, tomatoes that flower without setting fruit and older leaves taking on a purplish tinge. Reserve this treatment for your decorative water feature. The topic of plant nutrient requirements is covered in identifying deficiencies in aquaponics.

📦 Bottle and storage

You receive a single bottle, either 0.5 or 1 litre, to be stored sealed between 10 and 25 degrees, where it keeps for 24 months. The choice of size should be based on your pond volume and the measured level, not on how often you plan to treat, needing to dose every month points to a source problem, not a lack of stock. A 10-cubic-metre pond at an average dose uses around 300 ml per application, which makes the 0.5-litre bottle sufficient for a well-managed season.

Technical specifications

The essentials

Dosage: 10 to 50 ml per m³The point within the range is chosen based on the measured level.
Binding capacity: 3 mg/L in 50 m³ per litre

Feeding frequency and filtration

Interval between treatments: 10 days minimum
Before pouring: Filtration in good condition

Storage

Duration: 24 months
Storage temperature: From 10 to 25 °C

To budget for separately

Phosphate test: Essential for choosing the correct dose
Graduated measuring cup: For measuring out millilitres

In the box

1 bottle of liquid treatment, 0.5 or 1 litre depending on the format chosen

Dosage range, binding capacity, minimum interval between treatments, filtration instructions, storage temperatures and shelf life recorded on 19/09/2026 from the manufacturer's product description for the reference IchiPond Anti Phosphate, code 5425009252222.

Half a litre or one litre, depending on your pond

The same liquid in both bottles. What changes is the volume of water you can treat.

The same liquid, two sizes One litre fixes three milligrams per litre of phosphate in fifty cubic metres. Everything else is a matter of volume.

	Capacity (L)	Volume treated for a 3 mg/L reduction (m³)	Doses of 10 ml/m³ for a 10 m³ pond (doses)	Treats a 50 m³ pond in a single dose	Price
0.5 LYour choice	0,5 L	25 m³	5 doses	No	$24.00
Recommended 1 LYour choice	1 L	50 m³	10 doses	Yes	$47.00

0.5 L

What you receive

Capacity (L)0,5 L

What this covers

Volume treated for a 3 mg/L reduction (m³)25 m³

Doses of 10 ml/m³ for a 10 m³ pond (doses)5 doses

Treats a 50 m³ pond in a single doseNo

On the shop

1 LRecommended

What you receive

Capacity (L)1 L

What this covers

Volume treated for a 3 mg/L reduction (m³)50 m³

Doses of 10 ml/m³ for a 10 m³ pond (doses)10 doses

Treats a 50 m³ pond in a single doseYes

On the shop

Binding capacity and dosage range recorded on 19/09/2026 from the manufacturer's description for the reference IchiPond Anti Phosphate.

Estimate your
delivery time

This bottle ships in a small parcel and can be combined with the rest of your order at no extra charge. The exact amount is calculated at checkout based on your destination.

Frequently asked questions

8 questions

6 key questions, 8 in the detailed view

Which dose to choose between 10 and 50 ml per cubic metre?

How much phosphate can one litre absorb?

Can it be used in an aquaponics system?

Should filtration be stopped?

Where do the phosphates in my pond come from?

The water is still green three days later — should I dose again?

Does the bottle include a measuring scoop?

How long does an open bottle keep?

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Anti-phosphate treatment for garden ponds

The summary