ok so I got 3 armatus from river wonders when they were like 3" almost a year ago. Im confident the first batch are true armatus but mine grew from 3-12" really really fast. Now they are stopped at 12" for some time and eating more than ever. Wondering why the growth has slowed so much. I want to get these guys to a solid 18" or better so they can really be bad @ss. anyone's bigger than the 12" and its from that river wonders shipment?