I picked up a 90 gallon aquarium stand and hood this past week for a steal. I attached a pic of the tank design, basically two 45-46 gallons connected by the two swim tubes. Originally I told my husband we would make it a piranha tank(had to sell him on yet another tank)! Now after some reading I dont think it would work because of their adult size and the need for a school. Any opinions on this or ideas for something that could work other than a community tank? Im stuck!