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So I have a display tank in my living room , it's suppose to have a clean look to the living room but this month a black algae started to grow on the rocks and it looks really ugly , like I don't mind it but since it in my living it has to go , my last water change I try scrubbing them off in my...

So I set up at 5.5 planted tank first time doing one , got everything set up but I don't know how long should I be leaving the co2 on for or how much I need to use of it pl