Hi, I have 8 Sterba's cories and I was wondering about any effects of using really hard water. My tap water has a GH over 500 ppm and kH over 500 ppm. Currently I mix a 3:2 ratio of RO water and my tap water and get a GH and KH around 250 ppm each. Will my cories be ok if I stop mixing my tap water with RO water?
