Well I've had africans for a few years on and off but never anything more than buying a few throwing them in a tank along with a few pots, heater, and filter. However now I have 8 of them in a 55G tank along with one pleco and they seem to be doing relatively well. My questions comes in here, I am turning my 180 into a straight discus aquarium and have ordered my R/O filter for the tank. I know I read somewhere that someone used the purged membrane water for their african tank to help make it a little harder. Any thoughts on this is a good idea or just keep runing treated tap water to mine? My water isn't really hard or soft at this point but mid ranged water.