I am very biased against them, but I believe problems may start once they get bigger. That said, it won't take long to grow. Wouldn't it be nice if the packages said x many snails, shrimps, etc and we could pick what we wanted for each. I don't order the packages b/c of that, I pay a little more and order seperatly. If you have a sump or fuge then you could put it there. Again I am biased from a bad experience so wait for others to respond.