I was testing my water today and everything was normal, am 0, trites 0, trates 0 but my PH was at 8.8!! it is usually around 8.2 or a hair lower. What could have caused this? I haven't done anything special to the tank. Added a hippo tang and anemone but that is it. I switched to a sand bed from cc about a month and a half ago but I had been watching levels and nothing happened. Any ideas? I am doing a partial water change now to try and get it down.