Crypt is correct, the tank too small and he owns it. Go with 135 or larger.
In oneo f my tanks I have a spotter grouper and have a large wrass (the constant motion keeps them safe) and some Foxface (the trigger somehow knows to leave them alone).
I agree with with where Renegade was heading. If I add a fish and it begins to be picked on, I will cover the entire tank with a banket for one to two days. Slowly bring light back into the picture and most squabbles are over.
I have been dumping it into the street but:
1. It's heavy
2. Everybody wonders what I am doing
3. It stains the asphalt until it rains.
I guess I can throw it under the deck as you suggest - nothing growing there.
I live in a subdivision with septic tank and wondered what is the best way to dispose of salt water from partial water changes. I have two tanks which compounds the problem.
Any advice would be appreciated.