lol i made one with a systema container like this for my pond. I made mine 'inline' i guess you could call it. Suction hose from pond going to pump inlet, pump outlet going into the canister from the bottom (sealed with silicone), canister filled with media, outlet on lid (hose tail siliconed in place), hose into spray-bar, water into pond. works a treat Don't cut the sealing surface the lid o-ring seals onto. It will leak no matter how much silicone you use haha
HTH