I have never had a canister filter leak in 20+ yrs and at times running over 30 of them at the same time.
I've had my C-360 leak after I didn't change the O-rings on the valve block soon enough. I'v also had to tear down the entire top unit to fix the pump. It had gotten some grime into it that prevented it from working right and caused it to leak. These where of course small slow leaks that didn't cause any issues.
All of my canisters are set up the same way; mechanical on top mechanical/ biological in the middle, and biological on bottom.
in the house and under the stand I keep my canister in a large rubbermaid tub.
it worked great when the mag 350 started a leak at the hose connector(quick disconnect) bad o ring...all the water that leaked out, leaked into the tub and none got on the floor.![]()
Yeah this is pretty much the same setup I have going, might switch out some of the bio stuff now that I will have two honking sponger filters in there too.The sponges on the bottom, #2 full of loose carbon, #3 those plastic round biologicals, #4 ceramic rings with the fine filter pads on the top (cut to fit).
I only clean out my filters twice per year as its a fully planted tank with moderate stocking. This setup keeps it crystal clean. T