API Prevent Algae

$2.47 ~~$3.99~~ In stock

API Prevent Algae helps to prevent algae and keep the aquarium clean by lowering levels of phosphate - a food source for algae.

Non-biocide.

Safe for use in freshwater and marine aquariums.

Safe for use in planted aquariums.

Sizes:

118ml
237ml

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Customer Reviews (5.0 / 5 · 4 reviews)

Benjamin F. ★★★★★ Oct 21, 2026

My phosphate levels were creeping up despite regular water changes, so I added this after my weekly maintenance. Within a couple of weeks, I noticed the glass stayed clearer and I’m scrubbing less often.

Natalie ★★★★★ Oct 20, 2026

I've been battling green spot algae for months, and since I started using this phosphate reducer my water stays clear for a full week between changes. It's nice that it's safe for both my freshwater and saltwater tanks.

William O. ★★★★★ Oct 19, 2026

My tank used to get that ugly film on the glass every couple of weeks, but three weeks in with this stuff and the water’s stayed crystal clear. I like that it works by cutting the phosphate instead of just nuking everything, and it’s been totally safe for my freshwater community.