API ACCU-CLEAR Freshwater Aquarium Water Clarifier 4-Ounce Bottle

My koi pond water has turned green twice in the last year. The first time, one dose of this stuff and the water was clear within a day. It stayed clear for almost a year. The 2nd time, it took 2 doses and 3 days, but again the water's crystal clear.

API ACCU-CLEAR is handy for keeping freshwater aquariums looking crystal-clear. Since it works by clumping tiny particles together, it helps filters capture debris more efficiently. Regular use, along with good filtration and tank maintenance, can go a long way in maintaining water quality.

I've had cloudy water in my aquarium for a few weeks. I tried several things but nothing worked. I added this product to my aquarium yesterday and it's already much clearer.

It works well enough but won’t fix a tank that’s too far gone. I would recommend using as a maintenance product rather than a fix. The cap doesn’t have enough measurements on it.

I've been maintaining fish tanks for quite some time now and never needed to use a product like this. I recently got a new 20 gallon tank and for the life of me, I couldn't get the water to be clear. 10mL of this stuff IMMEDIATELY cleared up the tank, absolutely incredible.

Excellent product, the best of many clarifiers

Does exactly what it’s supposed to do. Very good highly recommended

don't work good it takes more than recommended