Planted Tank Guru
Join Date: Sep 2004
Location: Garden City, KS
SAE's are horrible at eating algae after the first few weeks of owning them goes by. That being said, they aren't even really known for eating the brown algae in the first place, as they tend to gravitate towards the greener kinds. But otos, on the other hand, LOVE this stuff. It is their favorite food in nature. Move your SAE to a huge tank, since it will grow WAAAAAAY too large for you to have in that one, then get a trio of otos.
I don't see you mention that you already have the angels you alluded to, but if you do already have them, move them to a larger tank as well. Really, 29g is just too small unless you are raising angel fry in there (only the fry, not their parents), and they will be moved to a larger tank once they are about an inch or two in size.