I have very hard water and high pH water and I am going to set up a 55 gallon aquarium and I need very colorful pretty fish that will do good in this water I can lower ph a bit though I REALLY wanted discus but I can't afford a reverse osmosis system. Is there any way I can have discus or is there any other fish like them I can have? Please help and thanks!!! Also I have a hot water softener if I use that and let it cool before putting that in would it soften the water??? Thanks!