Hey everyone I'm new here. I have 3 tanks, one with two green terrors (4 inches), one with a silver arowana (6 inches) and one with an american eel (14 inches). I haven't had arowanas before but I've followed all the rules and it seems to be growing healthy. My question is that I found a pearl arowana for sale, he's a bit bigger (8-9 inches) for a good deal, would it be possible to keep him in the tank with the arowana? Or would I have to wait for them both to get bigger? Any input would be appreciated.