I was having this discussion with some other people earlier. I contend that ph is not important for the average fishkeeper as long as it's stable and not extreme (somewhere in the 6.8-7.8 range I think). I think it's important if you're trying to get fish to breed or you're trying to create the perfect biotope, but for the average fish keeper who just wants a tank of colorful fish, I don't think it's a big deal as long as it's stable. I see too many people screwing up their tanks b/c they're always tinkering w/the ph (I've been guilty of this myself) mainly b/c it's very easy to measure and there's lots of chemicals readily available to use to play with it. Anyone agree with me or am I way out there?