Is it worth using for a community tank? My pH is about 7.6 and my fish seem fine... I have silver dollars, neon tetras, raspboras, bristlenose pleco, and Salt & Pepper corydora in my 55 gallon. Should I just use peat fiber to lower it to 7.0?If I should use it, how much do i add to my last level container in my fluval canister?I think my driftwood isn't releasing tannins anymore;been about one month being in the 55 gallon after driving off heavy amounts of tannin acids in boiling water. 