I have these fish being delivered tomorrow. I am fine tuning the water stats of my 55g tank. the corys will be joined by 6 otos and 10 platys. I read that Corydorus habrosus is sensitive to water stats. the problem is i have very soft water at ph of 8+. the platys and otos are used to that ph just wondering if i should adjust it to be more cory friendly. also is it true corys dont like salt?