Well I've been battling with brown algae growing in my sand and rock, my water parameters are perfect, only 8 hours of light, and kept feeding to a minimum. So I couldn't figure out why my tank was being taken over and I know others have had the same problem. Luckily I found the perfect clean up crew and in the matter of 1 night I woke up this morning to clean sand. I bought 5 large hermit crabs from my LFS
, anyone struggling with the same prob I highly recommend them.