I went to PETCO for a couple of 1 gallon aquariums to use as feeder tanks for a mantis shrimp to hold snails and hermits, and the guy there told me that they are having the $1 per gallon sale again!!! So instead of a mantis in my 10 gallon, It's going to be a feeder tank and I am buying a 40 gallon breeder. The 55 gallon is too tall for my mantle, so I'm going with the breeder. Is a 40 gallon breeder too small for a bimac? I thought surface area mattered more than size. If the 40 is too small, what are the other kinds I could put in it? I am not planning to get an octo for another 6 months at least, so that I can become more experienced. (I have only been keeping a 10 gallon "reef" for 2 months). I am prepared to spend $20 a week on food. are 2-3 large hermits a day enough for one octopus? Thanks in advance!