OK, I have a 29 gallon freshwater tank. It has mebay 6-8 fish in it, I cant tell anymore because the water is green. Green water. I cleaned the tank out and siphoned the gravel and refilled with tap water, and used water conditioner. I restocked the fish into it and poped in a new water filter into the penguin filter. After about a week the water starts to turn greed again. I am trying to find out wahts causing this algae bloom but I am starting to think that it is that my tank needs to be completely cleaned out with no fish in it and a clean filter and start the tank over from fresh. I guess I will need a temp holding tank untill my tank is good again for the fish to live and not make the water turn green again. Also, could my tap water be a problem? Our water is hard so we have a water softener so that should be taken care of. Water tested at a PH of 7.5. Any suggestions? I am going to my LHS to see what they suggest. Thanks.