The usual toxicity lists I have seen show Pachira aquatic as non-toxic. What is the toxicity reference you are using?The Pachira aquatica you've used is toxic, if eaten, though that is unlikely with a panther. There are safer, better choices, that will branch more readily and can be kept compact. Ficus, miracle fruit, aralia, and pothos can be found at most Lowes or Home Depots, though you may have to order a miracle fruit tree as they aren't commonly sold in stores.