Tetra Pond AlgoRem, 1 L is a garden pond treatment that quickly tackles green water, meaning floating algae. According to the description, it clears the water within one day, the first effect is visible within hours, and it also efficiently removes the phosphates algae feed on. Dosage is 50 ml per 1000 L of water. An important restriction: it is not suitable for sturgeon. The manufacturer asks you to read the label and instructions before use.
What the manufacturer claims
Tetra calls AlgoRem a fast, targeted solution for green water. The focus is speed: instant clearing of floating algae and visible results within hours. An extra benefit is binding the phosphates that fuel algae growth.
Key specifications
| Parameter | Value |
|---|---|
| Type | green water treatment |
| For | garden ponds |
| Target | floating algae, phosphates |
| Dosage | 50 ml per 1000 L |
| Speed | first effect within hours |
| Restriction | not for sturgeon |
| Active ingredient | not stated in the listing |
| Volume | 1 L |
Pros
- Fast. First effect within hours.
- Removes phosphates. Tackles a cause of the bloom too.
- Economical. A litre treats 20,000 L of water.
- Simple dosing. 50 ml per cubic metre.
- For ponds. Designed for large volumes.
- Honest restriction. The sturgeon warning is stated clearly.
Cons and what to watch
- Not for sturgeon. Ponds with sterlet or sturgeon are excluded.
- No active ingredient. The formula is not disclosed.
- No repeat interval. It does not say when treatment can be repeated.
- Floating algae only. The listing does not promise to remove blanketweed on stones.
How to work out the dose
First estimate the pond volume: length × width × average depth in metres gives the volume in cubic metres, and 1 m³ is 1000 L. Each cubic metre needs 50 ml of AlgoRem. For example, a 3 × 2 m pond with an average depth of 0.8 m holds 4.8 m³, so the dose is about 240 ml. A one-litre bottle covers a single treatment of 20 m³.
Why the water turns green
Green water is a mass bloom of microscopic algae. It is triggered by sunshine, warm water, excess phosphates and nitrates from food, leaves and lawn fertiliser, and by too few plants and weak filtration. A fast treatment will clear the water, but without removing these causes the bloom will return.
Oxygen after treatment
When algae die off en masse, their decomposition uses up oxygen. This is especially dangerous in hot weather and at night. During treatment, run aeration or a fountain, reduce fish feeding and watch the fish: if they gather at the surface gulping air, they need urgent oxygen and a partial water change.
How to prevent green water
Shade part of the pond with plants — water lilies, floating and marginal species. Do not overfeed the fish and remove leaves from the water. Use a filter with biological media, such as Resun bio balls, and keep lawn fertiliser out of the pond.
Fish in the pond
Do not use the product in ponds with sturgeon. For other fish, such as koi and goldfish, the manufacturer lists no restrictions, but dose precisely. For pond fish food, see for example JBL ProPond All Seasons.
Storage
Keep the bottle closed, out of reach of children, protected from frost and direct sun. Do not pour the product into another container.
Who it suits
The product suits owners of garden ponds without sturgeon whose water has turned green and cloudy — as quick help while dealing with the causes of the bloom. More products are in fish medicines and water care and equipment.
Verdict
Tetra Pond AlgoRem is a fast green water treatment for garden ponds that also binds phosphates; 50 ml per 1000 L, with an effect within hours. The downsides are that it cannot be used with sturgeon, the listing gives no active ingredient or repeat interval, and without removing the causes the water will turn green again.
FAQ
What is the dosage?
50 ml per 1000 L of water.
What pond size does a litre cover?
A single treatment of 20,000 L.
How fast does it work?
First effect within hours, clear water within a day.
Is it safe with sturgeon?
No, it is not suitable for sturgeon.
Can it be used in an aquarium?
It is designed for garden ponds.
Is aeration needed?
Yes, dying algae use up oxygen.
Will the bloom come back?
Yes, if excess nutrients and sunlight are not addressed.
