oh and i know that lots of fish like to feed on RCS's and stuff- is it a good idea to put some shrimp in if i have africans or gourami's? what if they are larger shrimp? our petco has some (i believe its called) Bamboo shrimp or something like that which are pretty damn big! The things were like 2" or something.. ! I saw them floating around on bamboo skimming the water for food.. really awesome.