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DonW

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Joined
Dec 15, 2003
Messages
8,753
Location
Tacoma, WA
What is the reasoning behind not having all your flow through the sump. Other than bubbles what are other problems. Assuming this is a empty sump no baffels just a skimmer.

Second can you use a bottom drilled overflow for a closed loop drain?

Don
 

mojoreef

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Joined
Jul 5, 2003
Messages
7,530
Location
Sumner
Don it really depends on the tank. If you are going to have a softie tank lower flow is encouraged (to a Point). For most tanks however you want a good deal of flow and flow that covers the tank. In running this kind of flow through your sump your going to have issues with bubbles as the water is moving to quickly through it and they cant dispurse. Also most of the equipment you run in your sump needs good contact time, from say a heater to other auxilary devices.

On the second question, if it is open to air its not a closed loop. In the case of a bottom drilled overflow it will be subjected to bubbles as the water comes over the top of it, these bubbles usually get compressed as the go through the CL and create a mess in the tank.

Their are a few tricks to make an overflow a true cl if you want though


Mike
 

cronicreef

Active member
Joined
Jul 18, 2004
Messages
38
If something goes wrong with your main pump in your sump you won't have any current at all. If your not at home or don't see it right away your tank goes still. That is the only reason why I have PH inside my tank.

I'm glad that I do because I came home today from work and notice my 4 day old mag 9.5 wasn't running!
 

DonW

R.I.P.
Joined
Dec 15, 2003
Messages
8,753
Location
Tacoma, WA
Thanks
I'm helping a friend set up a 55 on a small budget. We have a mag36 for a return pump. The tank is Toms old one with two corner overflows. The theory was to drain through the overflows of course. The return would be split into three. One 180 sweep swirl in back center and 90 swirls in the two front corners.
This will be a softie tank due to lighting budget.

Don
 
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