I wouldnt do it. Period. Neither of the fish are easy to come by, much less at a decent price...Armatus don't like other "Silver" fish...if you check out anyone that has aan Armatus for a long period they cannot house them with other Silvers for a reason. A lot of hobbyist ave tried with other Payara, ATF's, Silver dollars, etc...only to have the Armatus kill or badly injure the fish by. A lot of these guys have tried with Goliath ATF's only to end up seperating it later with large Armatus Teeth marks....same with other Armatus...