closed loop?

[almo75]

Hello everyone,
Just a quick question. What is meant by closed loop? I have been planning a sump project and stumbled across this term while reading old posts.
Thanks,
Al

 

[scootrnerd]

a closed loop is just that its a loop of water movement that doesn't get filtered it runs in one pipe and out many others. it eliminates the need for power heads in the tank looks like this

 

[Amphiprion]

Yeah, it is difficult to describe. The picture explains more than anything.

 

[almo75]

Interesting. Thanks for the heads up!

 

[vorlx]

I built out a closed loop in an effort to replace the power heads that were not very friendly to my anemone. I also implemented a scwd (wave type device) to alternate the flow between the outputs. The problem was that to accomplish the 2400gph I was getting from my Koralia 4's I would have to have a rather expensive pump. I had aquired a mag 9.5 and it just wasn't the type of flow I wanted. I ended up using it for my sump. In summary, I like a closed loop alot better than the power heads, it's cleaner and better in appearance. However the bang for the buck isn't the same to me.