Bests & Worsts Reviews from Amazon

This product is absolutely terrible. I tedted the chemical balance in my tank and everything was good. I used less than the allowed amount of this product and 4 hours ago and when I returned, all 20 of my fish were dead. I would say poisoned. They were perfectly fine before as I had haf them for 6 months. Now I have to replace all 20 expensive, dead fish. I would like compensation for my lost fish.