Hello to All, I joined this forum mainly out of frustration. I just set up my 75 g tank with a sand bottom back in Sept, 2012 and have gone through all the new tank problems. I am guessing I am now having problems with the brown algae now (sorry can't think of the real name for it now). It easily wipes off the sides of the tanK and decorations and the water is getting more and more cloudy. I have reduced the amount of food (flakes) that I feed my fish. I do 20-25% water change every two weeks as a norm. The test strips indicate that everything is good except maybe my Ph is high?? (8.4), but it stays constant. I have 12 2"-4" fish (4 goriami's, 3 angels, 5 tetras). I continue to wiped the brown stuff off the tank and decorations 2-3 times a week. Just can't seem to figure how to fix it.