I want to breed food for my bimac to save $$ and time. I have either a 10g or 30g I can use for this. I already have multiple tanks, so I want as close to 0 effort to go into this breeding tank as possible. So something very easy to breed, that the Octo can eat as his main diet (supplemented by other foods of course). I've heard fiddler crabs are basically as easy as putting a handful in a tank and just waiting for the babies. Is this true, and are they suitable enough nutritionally to be a significant part of the bimac's diet?