Title: It kills algae but it makes kois sick
Product review: I've a Koi pond and bought this product based on Amazon reviews and the product web site saying that it's safe to use in Koi pond.The product works in that it cleaned up my pond by killing algage but it also made my Kois sick.Basically, the product releases toxic(copper)slowly which if I had known, I wouldn't have bought. Also, this product is banned to be used in Spa. These important facts should have been disclosed and copper test kits should have been provided instead of misleading Ion test kits.I don't recommend this product for Koi ponds. Even for swimming pools, I've doubt on the safety.
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