He's looking very confident in his new home, already knows he's the boss lol. But good also to see you Datnoid looking so stable and not shy/hiding -- makes me think I should add some more fish to my (stable colored but mostly shy except during feeding) Dat's 375 (currently just him and Flagtail buddy).
It's been a long time since I had an aro but as I recall they grow pretty fast. Not sure if the black skirts are gonna be safe. But like I say, I was a kid when I had an aro. Grew from 2" to about 9" then jumped out of the tank.
His a push over bro, dats gangup on him when he tries to bully them. For the poly he dont ever bother it, i had 3 cb endli with him and now just a 5” congi but never seen it get bothered, actually the dats will bother the congi more than the jar.
