hi, i want a brislenose for my 30 gal tank. will a single one be ok or do they like to be kept in groups. i dont ideally want babies, but i could just pick a couple of the same sex. also is it best to keep two males together or two females together.? what do i feed them? i have catfish pelets but do i need to get pleco wafers? i already put veggies in for my ottos. Thanks Nick.