The two ARTC have been doing well. One is 4"-5" now, the one that got the best position in the middle of the tank where most of feed is. The other is about 3" and is either not as assertive and ambitious or simply unlucky to have picked an inferior spot in the tank on top of the bottom drain screen.
While not the primary focus of the video, they are talked about and shown in the video. Also, the bigger one has gone into a different 240 tank (along with the golden dorado), so they are separated now.