I have the same problem with my new pair of aros couple of days ago. My problem is I have a bigger aros in the left end of tank, the new pair of smaller aros was being attack by the big aro when swim to left. So they kind try to "push" right end of glass. What I have done is I moved the big aros into a 75 gal, and let it stay alone, it is 9 inch, 75 gallon will let it live for a long time. The new pair of aros are swim good and happy now.
You situation is probably the aros are shock from something in the tank. You can check on that. If this is not the problem. You can check the water parameters. or use some Stress Coat to help fish calm down. But, my personal experience, StressCoat is really very week, effect of it is very light, you can use it regularly. But if the aros are really scared, frighten, or shock, you may need to use Arowanas Stabilizer, its very effective.
You situation is probably the aros are shock from something in the tank. You can check on that. If this is not the problem. You can check the water parameters. or use some Stress Coat to help fish calm down. But, my personal experience, StressCoat is really very week, effect of it is very light, you can use it regularly. But if the aros are really scared, frighten, or shock, you may need to use Arowanas Stabilizer, its very effective.