I treated with Interceptor because I had red mites. I knew I needed to run alot of carbon and do it efficiently so I decided I could build something that worked better than just tossing a bag of carbon in my hang-on refugium. I don't have a sump so this is what I came up with. It looks pretty trashy on my tank, but it's only temporary. As far as I can tell it's working great, I only wish it was clear. I'm using a Maxi-jet 900. The best part is that I can unscrew the threaded coupling and just replace the carbon, or anything else in a media bag and screw it shut. I think this would work really well on a bigger tank using larger diameter pipe for more flow and more capacity.