So I just recently checked my ph level and its at 8.2... Obviously that is much to high. I have all community fish in it and I'm nervous as you can imagine. I just did a 20 gal water change/vacuum. How do I keep my ph level low? Feed my fish less? Do more pwc? The water coming out of my house it at about 7.6 which is still high I think? Should be around 7.2 right? Any advice on how I can my ph level lower?