I have a 30g tank with 2 GBRams, and some rummynosed tetras. I would like to add an apple snail or some shrimp, but have no idea how the fish will react. I am new to any fish keeping other than puffers! I have 3-4 large amano shrimp with my puffer (he has never attacked them, and they are now REALLY big). So this is my first "regular" tank and I really love it (well not as much as the puffer) - but the question is whether shrimp and/or a large snail will be ok with these fish. What about cories and shrimp/snail?