I would’ve loved to do like a 20Gal+ but my university allows 10GAL aquariums in dorms at max if its bigger you are forced to remove it otherwise u get fined. I was thinking of just doing a big aquarium and leaving it back home and have my family care for it daily and do big weekly cleanups by coming home on the weekends. However this way I would have no relationship with the aquarium and diminish the point of keeping an aquarium. Maybe I can give away the rasboras and pick up another peaceful species or just keep the betta alone.Harliquen Rasbora's need a 15g tank as a minimum. I recommend you separate the Betta and the HQ's. Keep the Bettas in the 10g and get a 20g long for the HQ's.