Count him lucky. Many chain stores won't take in big fish, even if given to them for free because they take up space and could introduce disease into their system. Likely at least his water is good because of the system. I've heard of stores finding bags of fish on their doorstep and throwing them away. That's why tanks of 200 adorable 1" oscars piss me off. They can live for 20 years are swiftly outgrow the normal starter size tank People move and movers won't take big tanks
Post this on local CL and mosterfishkeepers.com and hope the fish finds a good home.
Post this on local CL and mosterfishkeepers.com and hope the fish finds a good home.