I have a 36g planted tank with 2 banded rainbows, one pearl gourami, one bolivian ram, one cory cat (soon to be more like 5 or 6), and 3 upsideddown cats. I'm also planning on adding some a school of small tetras. I'd like to add some shrimp that are pretty cool and that I can see (i.e. not ghost shrimp.) Firstly, can I add any shrimp with this mixture of fish? If yes, what kind and how many can I have?