I personally kept rbp many years ago. If it was me I would go with the 150 gallon and go with the less aggressive rbp. I would get a group of 6-7 babies but beware they are very cannibalistic at that size so may lose 1 or two. Aquascape with gravel and driftwood the lighting doesn’t need to be bright they prefer dim. My choice for filtration would either be 2 110 aquaclear filters or a sump. As for food know need for live feeding unless cousin prefers that over non living foods. My choice for food would be strips of Tilapia, and good brand of pellet. Feed the 1-2 inch flake food and small strips of fish. Don't feed mammal or poultry.
