
I live in an area where tap water is made up of rocks covered in chlorine. The total hardness of my tap water is usually 100-200ppm, sometimes up to 200-400ppm, and it's so heavily chlorinated that sometimes it smells like pool water and the bar of soap doesn't foam unless I wipe it off first. The anti-stress layer makes my water safe for my goldfish and catfish and any plants that can grow faster than goldfish can eat them. I use a double dose (1ml per gallon of water) and have never had chlorine in my aquarium water. I change about 12 gallons a week and this size bottle lasts about 6 months.

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