We just picked up our 5 Otos today and they are acclimating to the water now. I've left Scarlett in the tank so she can see them and see how the reacts to them in their bag.
In a minute I'm going to remove Scarlett from the tank and add the Otos. I'm going to give them time to get used to the tank and all that's in it. After awhile I'll reintroduce Scarlett to the tank. At that point I will be watching closely.
Wish me luck and I'll keep you updated (good and bad) on how it goes. Let's hope she doesn't mind these little guys.