So I have a newly set up goldfish tank, 1-3-13. It is 26 gal with an Aqua-Tech 20-40 hob filter & a whisper 20 air pump & 15" air stone, all given to me. I have two goldfish about 2" each from nose to tail & one small plecostomus. My ph is higher 7.2 but steady and the ammonia levels are high...