I keep, Obesus, blackbanded, Orange spotted, shadow bass, dollar, Pumpkinseed, and Blue spotted, which come a pretty varied range of the country from where i am in Indiana. The ph out of my well is about high 7 usually, and all the above are kep in the same water, which makes for easy water changes. I notice no ill effects, all seem happy and healthy, good color, and eat like pigs, so either they are very adaptable, or dont care. The most accurate advice though would come from the post above.