The water out of my tap is med hard and has a pH of around 7. I am thinking of getting some SA cichlids and from what I understand they need soft acidic water. Yesterday morning, the pH in my tank was between 7 and 7.2. Around noon yesterday I filled a 3x8 mesh bag with fluval peat granules and stuck it in the filter box of my marineland penguin 200 on my 37 gallon tank. I Checked the pH a few min ago and it's around 6.5. Very surprising results. Hopefully the tank inhabitants will appreciate the more acidic water. I think it's altering the pH slow enough to avoid any shock to the fishes, but I am not sure. 5 platy fry, 5 cories, and 1 RL pleco all seem to be doing fine. Anyone else out there using peat granules with success? Oh, also it's not staining my water so far. Still nice and clear.