well, ever since my first one died a few months ago after only having been in the tank for 5 hours, i've been scared to try these again. But I was at the store the other day and they had what looked like a really heathy batch of them so i picked one up. he is still doing good this morning. i have my fish in a 10 gallon planted right now. my question is should I get some friends for the little guy (a couple more ottos)? how many for a 10 gallon? will they hang out together?