Quote Originally Posted by waldorfsalad View Post
But if it's normally 6.8-7.0 range, then it is an indication of ammonia/nitrate/nitrite problems, even if your test kit is reading normal on them.
You should review your post again as it doesn't make much since. 7.0 pH is neutral. pH ranges can vary greatly between fish, I've seen some have a suitable range between 6.0 to 8.0. Slight increase/decrease is not harmful, it's when levels move quickly when you should be concerned. If a 6.8 - 7.0 range is an indication of water parameter issues and the test kit is reading normal (believe you mean in the safe zone) what's the point of master test kits. All we would need are pH tests. Unless I'm completely misunderstanding your post this goes against everything I know to be true of fish keeping.