i dropped 10 cherry shrimp into my 36g...they were very tiny, my gourami and cherry barbs went after them immediately and I thought they were all toast. I have a large amount of java moss in my tank, today I counted 8 of them and they are almost twice the size they were when I got them a couple of weeks ago....Bottom line, i guess, is that if you provide a place for them to hide (java moss or dense plant) they should be able to survive. Also make sure your filter intake is covered (i used ac sponge cut to fit) as I found a cherry shrimp in my canister filter (it was fine).