Hey Melanie, the algae killer stuff never worked on my tank, and it was green and cloudy for aaagggeesss (months) but I got lots of advice form ppl on this site and its FINALLY (woohoo!) gone clear. Anyways if ya reduce light to the tank (about 10 hours a day), so if ya put the light on a timer it'll help. Fish that eat algae are great, so a bristlenose, otos or blackline flying foxes, or for a cold-ish water tank a borneo sucker/hillstream loach are good to remove the algae thats there. Also it might be a sign of too much phosphates in the tank, and if you put plants in the tank it'll suck up the excess nutrients that will feed the algae. Alternatively theres stuff like Chem-zorb that will absorb that stuff. I put in Phos-zorb in my tank and now theres so little algae I'm worrying the algae eaters dont have enough to eat... Water changes help, but if you don't remove the cause its just going to keep on happening, over and over again
I tried the algae killers (Algae-rid) to be specific, but I didn't see ANY change at all, and it just got cloudier.