Maroon will not get along with any other clownfish except a small male, once they're paired. Don't know how large your percs are, but the maroon will most likely attack them.

Can't help with the bare tank question.

I knew would happen if I put it in the tank. So I kept it in a strainer floating in the tank.

It's now in the tank I setup. I'm hoping it survives because it's been through alot of stress. I wish I had a QT setup and ready to go. Never needed one before this.

What a relief! It's made a great recovery and is doing very well. I also put the chocolate starfish into the QT. I Don't know what I'm going to do with it but it's in my QT away from my 10G reef. I hate learning the hard way!