My tank sits in the corner of a room where the sun its it on one corner for about a half an hour to an hour in the morning and i am starting to develop a little bit of an algea problem. I know the best answer would be to move the tank but there is no other place in the room suitable. My LFS told me that a UV sterilizer would solve about 90 percent of the algea problem and i was wondering if this is true i have read where many people think they are useless and just a way for the LFS to make a few extra bucks.