Is my fish selection okay? tell me how much of each?

gara rufas are not ok when they get older, albeit they are rare. The needle fish is not ok, and I would highly caution against the crayfish. Stick to shrimp. Crayfish can be territorial and aggresive towards fish. If you are to lose something in a tank I would suuspect the crayfish in that tank. However if something went missing in a tank with shrimp I would ume it would be the fish eating the shrimp. That's usually how it goes. If you get shrimp (I would; good cleaners) then make sure they have places to hide.