i have an algae problem in my tank. there are alot of hairy algae all over my tank and im wondering what i can do to control it. my nitrate level is at 0 but i dont know how much phosphate is in there? is there something that i can buy to help control the phosphate? i have a 12 gallon nanocube? also the water in my tank is not as clear as before, should i was my filter? or how do i get it to be clear like before?