I don't know a whole lot about fish other than "Happy plant = happy fish" I have 6-7 zebra danios 2-neon tetras 2-3 ottos 1 SAE 2 bloodfin tetras some other kind of tetra I was looking at some pearl gourami's and a cory cat and silver dollar today. Would any or all of these be ok with the other fish? Do the cory's eat algae or clean the gravel? -Travis