My ph always test around 7-7.5 ish and definitely dont want it to be higher. Howerver my water is always on the soft side when i have it tested at lfs or my own tests. My fish prefer a little harder water, so how can i increase water hardness without raising the ph, or is that possible? I have tetras and as i understand it they prefer lower ph. How is it possible that they say my ph is a little too high but my water too soft.. Thanks! Btw, i use filtered tap water or spring water in tanks, and they are both soft here in southeast.