A few days ago I added a sand substrate to my 5ft tank and the fish LOOOved it! They were all so happy digging away and doing the fish versions of snow angels. Fish made hills and valleys appeared overnight and I was happy because they were happy. Last night when I fed the fish I noticed one of...

http://www.tropicalfishkeeping.com/members/44161/album/ So i cleaned out my 55 Gal tank, painted the back Black, laid out the rockwork, connected a Fluval 406 Canister filter (bck right corner) and have a Topfin 60 HOB filter on the back left. used Pool Filter Sand and Aragnite for...