Hi, I am trying to findout if it is ok to place a crushed coral media bag in my second tray with my bio rings in my fluval 207 canister? I just tested my KH and GH, KH is at 53.4 ppm and my GH is at 178 ppm. My PH is looks to be between 7.0 and 7.2. I am running a fresh water 30 gallon tank, molly's, platies, few algae eaters and a couple snails, also some plants ( java fern, water sprite, momeywort, anubias, scarlet temple). I want to raise my PH and KH a little. Appreciate any suggestions.