envii Algae Klear Xtra, Blanket Weed Treatment for Ponds, Removes Blanket weed & String Algae Working All Year Round, Safe fo
Reviewed 1 September 2026 · price checked live
Check price on Amazon →Overview
envii Algae Klear Xtra, Blanket Weed Treatment for is one of the 27 fish & aquatic pets products in our catalogue, tracked on rating, review volume and live price. The maker describes it as follows: Algae Klear Xtra safely removes submerged blanket weed and string algae in all ponds. Our algae treatment can be used all year round making it suitable for treatments through winter. Specifically designed to target and kill all submerged algae effectively within 3 weeks of the first treatment. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.1 out of 5 from 4,170 ratings. What that score is worth next to its rivals is set out below.
- Brand
- envii
- Amazon rating
- 4.1 / 5 from 4,170 ratings
- vs Fish & Aquatic Pets
- 0.4 below the category median of 4.5
- Rank in category
- 21 of 27 rated fish & aquatic pets we track
- Price position
- Towards the top of the range (category spans £2.33 to £26.63)
- How proven
- Moderate review volume
How it compares in Fish & Aquatic Pets
Across the 27 rated fish & aquatic pets products we track, the typical score is 4.5 out of 5. This one sits at 4.1, which is in the bottom quarter of the category. That does not make it a bad buy, but there are better-rated alternatives on the same shelf, so it needs another reason to earn your money.
It carries 4,170 ratings against a category median of 4,554. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the upper third of a category running from £2.33 to £26.63, where the midpoint is about £9.85. Paying above the category norm needs a reason beyond the rating, because the score alone does not justify the gap here.
Worked out from the 27 fish & aquatic pets products in our catalogue, not from the brand's own claims. How we rank →
Key features
- Blanket Weed Remover – Algae Klear Xtra safely removes submerged blanket weed and string algae in all ponds. Our algae treatment can be used all year round making it suitable for treatments through winter.
- Fast Acting Treatment – Specifically designed to target and kill all submerged algae effectively within 3 weeks of the first treatment.
- Safe for All Fish – Algae Klear Xtra is completely safe for all fish & plants whilst encouraging the overall health of your pond.
- Helps Prevent New Algae – Due to our unique UV light filter, this will help supress the growth of new blanket weed and algae at any temperature.
- Treatments – A 500ml bottle is enough to treat 10,000 litres. We also have a 1L bottle which treats 20,000L & 5L treats 100,000L.
