The Planted Tank Forum - View Single Post - Tom's (Rapid's) mini canister filter
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post #2 of (permalink) Old 01-20-2013, 07:14 PM
Planted Tank Enthusiast
Join Date: Feb 2012
Location: Edmonton, Alberta
Posts: 571
Just a thought but all the aquarium canister filters I've ever seen work the same way, water is drawn in by siphon and flows through the filter via gravity and/or displacement from the siphon then goes into the pump for the return trip back to the tank.

The only canister filter I can think of that MIGHT work by pumping water IN is the API canister. I seem to recall that filter having it's pump inside the tank, but I don't remember if it's on the intake or the outflow.
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