You can do whatever you want with it as long as you have a big setup. That pump is huge and it will make a little bit of heat. It's meant to power something like a waterfall/bio filter in a backyard koi pond. You need a fairly large amount of water to dispel the heat if you run the pump continuously. Or just use it intermittently to flood a large bed of media. It will do that very quickly.

Thanks for the response.

Yes, it was originally for a koi pond, but birds ate the fish and the guy called it quits.

Generally in an aquaponics set up, how often would you want to cycle the water in the system?

not sure in aquaponics, but i read in hydroponics that you want to cycle the solution atleast 1-2 times per hour