C-Loop, refresh my memory

[BigJPDC]

Why is it that I think I can't relocate my closed loop intake to inside my MegaFlow tower? I could take the snail screen off it and place the opening way down below where the durso sucks from.

I seem to think that I thought about this before and it was a bad idea?

Here is a shot of what my intake pipe looks like, it's a melev style OTB CL.

thanks RC!
jp

 

[hahnmeister]

Well, if the sump pump turns off, your closed loop would run dry then, no?

 

[BigJPDC]

A-ha! lmao, indeed Hahn, if I turned the return off for a water change or whatever, the CL would drain that overflow dry in a heartbeat.
Thank you!
jp

 

[dougchambers]

Technically, you might be able to pull it off if you are running a durso or similar type of stand pipe in your overflow and your CL pickup was at the bottom of the overflow well. However, you generally don't want that much water going into an overflow. You would have your return pump rate and what every rate you run your CL at. That's typically WAY too much flow for an overflow without getting lots of noise and potential micro bubbles.

-Doug

 

[schneijt]

Seems to me you'd also probably exceed the Megaflow's capacity to get water through the little slots that rapidly...

-Joe

 

[EnFuego]

<a href=showthread.php?s=&postid=9030741#post9030741 target=_blank>Originally posted</a> by schneijt
Seems to me you'd also probably exceed the Megaflow's capacity to get water through the little slots that rapidly...

-Joe

that would be my concern as well.

 

[hahnmeister]

doug is correct, but the overflow must have enough of a water volume inside to make sure that all pumps can be switched off, and then the closed loop switched back on again and enough water remains in the overflow to keep the CL pump from running dry. Pretty much, the overflow acts as its own sump then for the CL... so its internal level will go down a certain amount just like when you turn on the sump return pump. And considering the flow going through it, this volume would have to be significant. Im talking 10g of water at a minimum in the overflow for a 120g. This also doesnt take into account evaporation... within a day that overflow could be running dry.

Another reason for not running it through the overflow is that its defeating the skimming ability of the overflow. The best thing to do with the protein rich top layers in a tank is to feed them directly to a skimmer in the sump... not mix them back into the general water body.