ok so heres the deal... i have a 55 gallon tank and i used to have a high powerd light on it for my live plants.... after a month of the set up i decided to dith the plants n change to sand... after i did tht the algea started to grow in my tank lyk crazy cuz the light was creating algea n not supporting my plants cuz i took the plants out........ i did water changes about 2 times a week and it wud not clear up....my tank wud stay green.......so i decided to get a nu light... now i have a basic light for a 55 gallon tank...i did a 50% waterchange today to clear up the green thinking tht i wud not get another algea bloom because i didnt have the high intensity light ny more...still my tank is green....i used all the right chemicals n idk wut to do...i used prime ammo lock and algea destroyer but its still green.....please help i need it badly!!!!!!