what clean up crew do i need

[treybomb]

i was wondering what kind of clean up crew i need to get rid of the brown stuff on my sand and now its startingto grow in the glass
i have a 20g FO with 2 percs and will be adding a coral beauty for my last fish
please help!
thanks
thomas

 

[shista]

about 5-10 turbo snails and 5-10 hermits would be good. and mabe one conch

 

[treybomb]

i dont have lighting for the clam
i heard turbos dont do well in groups?