Guys setting up a new tank in the garage to try and breed on a few crs. I have an old eheim canister already running in there and have been looking at various prefilter options.

Has anyone considered / tried / succeeded in adapting these as the pre-filter inside the tank?

http://www.hueyhung.com.tw/E/body.php?web=11&FNo=111

Do these have to be driven by air I think is what I am asking.