steve wrote:Sumps, if I recall are not all efficient for RES. Is this going to go under the tank? Do you have a link to it?
As a guy running a refugium for over three years, I'm going to rephrase that as "a sump alone is a bad idea for a RES."
You basically can't have a sump drawing far below the water because a power outage or pump failure means your main aquarium water ends up all over the floor. I use a hang over overflow. Reef tanks are built with internal overflows that are still quite high in the water column.
As we all know, turtle waste sinks. And there's a lot of it. Canisters have this large siphon pulling in water near the bottom of the water column, which pulls in some turtle waste, or all of it when Tobie gets too much lettuce
My sump, in addition to my canister, though, proved is superior filtration. I have gallons of biomedia, and the duckweed even pulls out enough nitrate that I can extend my water changes. When Tobie was smaller, nitrates were almost undetectable and I only did water changes because I figured there were trace minerals that needed replacing and other pollutants building up my tests couldn't detect.
So, sump alone, bad. Sump plus canister, good.