I have a greenish colored algae growing on plants and certain parts of my driftwood, it does wipe off as I will clean during each water change (weekly waterchanges) within 2 days there will be algae growing again. Its a 55 gal 22 inch depth tank with a 48" satellite freshwater led +, a 70 aquaclear hob. Its a gravel bottom with 3 clown loaches ( still small ) and 6 diamond tetras. Please help as I cant figure out the algae reason. My lights are on 7 hours a day, I just now swapped it to 4 on 4 off and 4 on to see if thatll help. I dose seachem flourish once weekly and flourish iron every otherday. Any and all criticism and help is wanted.