algae is not bad for your fish, we just do not like looking at it, long as your water perams are good, again less feeding, and feed slower, feed no more than they will eat aggressively, A hungry fish is a healthy fish. all that being said you will never stop getting some algae. get a magnet scrubber or a hand scrubber to keep it off the glass. or do as I do and get a common pleco long as tank large enof. keep in mind they poop allot in long ropes.