thanks guys! Yeah im using t5's but probably is not enough for a 100 gallon tank because im just using 8x 39w and 2 solarmax 2x24w t5. will probably change lights soon. i clean my side and front wall algae but i dont clean my back glass because it is pretty hard to scrape them off already and hard to reach. that rbta is semi-exposed to my lights because it likes to hide a little bit from the light. hopefully it wont be pure white someday. i feed it too.