I've had a mated pair for 7 years. The previous pair even longer. They are best as pairs but have to be collected that way, otherwise they will not tolerate another CBS. They are tough and extremely interesting. They are primarily nocturnal, but are also active during the day. They require a cave or large overhang to do well long term, and will die almost instantly if exposed to any copper. Reasonable calcium and trace element levels provided by regular water changes, and a varied diet are essential. How much research have you and your friends done? Real information gathering, not a few paragraphs of superficial internet site stuff. Consulting a book or two or three is practically an ethical requirement before you try keeping anything.