My friend's got a 150 tall with a 6" oscar, 2-3", 3-4" JD, 6-7" Tx, 2 3-4" cons, a 3-4" CL and a 6" pleco. she feeds 1-2 times a week, does weekly 25% WCs and the lights on a timer for 12 Hr/day. Shes says she's gopr green algae on her glass really back and her mag-float dont cut it. she's removed all decor from the tank and vacced really gooda and its still a problem. i discouraged her from using an algae killer product and recommend her to use a razor blade and cut all the algae off, do a 50% WC and use a phosphate removing pad in her filters. She doesnt want to have to cover and starve the algae like i reccomended if all else fails. She wants to know if another pleco will help or what else she can do. i figured more heads will bring better info.