Hi yemista, i think your tank could hold 1, as ive read someone u have to have 20g per RBP, i could be wrong here, but think thats around wot it is, hope this helps and am sure more people will give u advise on this soon
I know of people who keep one per 30g, but ideally I would suggest 40g breeder or 55g. The rule is 20g per rbp but that only comes in to play when talking about multiples of 3 or more.