I have tried several times to raise a black arowana and they keep dying. Had my latest one in his own tank weekly water changes eating Hikari food sticks. Woke up this morning and was dead. I want an arowana for my 220 gallon tank. I wanted a black arowana because I was told they don’t get as big as Silver albino arowanas. Is that true? Would a silver arowana get too big for my 220 gallon? Or should I try a black arowana again? Let me know what you guys think. Thanks for your input!