Yes he did, to the point that he wanted to keep a ray also! But he has learned along the way.:usa1:
Win, what size tank are you getting? Can't tell you who to move with out knowing what size tank you will be getting.
BTW, what is your brother's set up like? 400 gallons would be nice for the ray, but if it isn't setup for a ray it will not be good.
The ray not only needs lots of unobstructed swimming room, but it also requires fine sand bed (their belly is very delicate), and cannot be in a tank with other animals that can/will attack it. Puffers, triggers, groupers all come to mind for starts.
OK, make a list of the fish & sizes you currently have at the moment. Go research those fish as to optimal size, and gallon requirements. Then make 2, or 3 lists according to size.
Keep the smaller ones in your current 72, move the medium ones to the 90, and find the large ones new homes.
I'm sorry you will have to rehome some, but most import factor is the well being of the animals. Fortunately for you, your brother has a large tank to which perhaps your large fishies can go to. Then you can visit them......
Win:
You have been given good advice thus far.
I wanted to mention something else. You should feed your fish a varied diet of food. You should try to avoid feeding only 1 type if food, as it may create gaps in the fish's nutrition. A varied diet is generally the healthiest diet. I feed a pre made frozen mixture of foods made by our own daceman, but it is similar to Rods food which i love!!!