I have had one place in my tank, with floating plants, where the Aro chose to rest. I put bubbles on the other end, an airstone and a bubble curtain. He was bananas over the bubbles. He'd swim and work his way until he could wedge and stop and sit in the bubbles. He even bit and popped the big bubbles for fun. In fact, all of the Aro's I've had loved bubbles.
The most bubble crazy one I had was Gu Kaan, the one in my signature vid clip. I used to reach in gently and hold the meaty part of his tail, just enough so he could stay in the bubbles. If I let go, he'd race back over and swim through my fingers and stop when he felt my fingers so he could keep hanging out in the silly bubbles. What a great fish he was!!