Triple Canister Sump?

Don't understand the purpose or advantage of this set up. What exactly are you using the sump portion for then?

You might be better off using an actual sump or small tank for main tank eater to go into, then use the 3 canisters individually to pump back into the tank.

I agree with the above. If you look at how the seals work on canister filters, if you put positive pressure into them, they'll probably start leaking.

I have 3 canister filters hooked up via PVC on a common intake/output system which works pretty well. You could also put the filters external to the sump and each section of the sump have a different canister filter, like this (excuse the crude drawing):



All in all though... I would say using canisters with a sump is overall a waste. Maybe use 1 canister as a polishing filter, but if I were to go sump (and I wish I did!) I would use primarily filter socks. So much easier to maintain than always opening up the canisters IMO. Also, if you don't use a filter sock, you're already kind of wasting the advantage of a sump where you have some water pressure created by the water falling into the sump. Instead you're using canisters with their own pumps, and then using another return pump. You're using twice as much pump electricity as is required for your overall flow rate, if you understand what I'm saying.

I built a manifold of sorts to run 2 canisters off of a single 1" siphon but I abandoned it due to being overly complex and totally unnecessary.

I agree if your going to go through the work of setting up a sump, just use a sump. I set mine up with a gravity fed 6 compartment trickle tower. There is a coarse bonded blue polypad, followed by a pile of filter floss. Super easy to clean. I've never had such clear water. Filter socks work basically the same way.

You can always just use canisters and buy in line heaters to mount in the return hose if you want to keep your tank free of any extra junk in the display.

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