Closed Loop Help

[dirtefish]

Just about ready to drill for my closed loop, and was testing flow through a 3/4 squid.
Have about 5 different pumps ranging from 500gph to 1200gph so was planning a 500gph return pump and 1200gph running through my scwd to two closed loop returns.
In the effort to save drilling more holes in the glass I was wondering if just using the mag12 as my return plumbed to my scwd and two return lines would give the same benefit as a closed loop.
Would this be too much flow through my sump? Its a 30g 36in acrylic tank converted to a standard sump. Standard baffles for water lines in skimmer section, chaeto/rubble compartment, and return pump.

Main concern with the closed loop is that I would have 2 holes for loop return, one for the intake, and one more for the return from the sump. The intake for the mag12 would be a freaking vacuum and the thought of livestock getting sucked against the vent is a bit scary. Second concern is I would have a total of 7 holes drilled, would this be too stressful on the glass?

Any help would be appreciated pic is below, its ghetto paint. But needed something besides my sketches in the post.


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[dvenson]

I would not use a closed loop on such a small system. I Would suggest using a powerhead instead of the closed loop. If you do decided to run the closed loop run it completely separate from the other pumps and don't connect it to your return pump because if the pump is turned off the water will drain to the lowest hole drilled and risk flooding the sump

 

[dirtefish]

Not planning in the loop running thru the sump sorry if it sounded that way.
Was more or less comparing a closed loop vs return pump with scwd. With the concern being 1200gph being way too damn much going thru my sump.
If use it as a return the holes would be higher with a siphon break.

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[Dr.DiSilicate]

What size tank? My mag 18 causes the overflow to make a lot of splashing noise as the water flows over it. IMO a closed loop may be a better choice, depending on situation.

 

[dirtefish]

Leaning towards cl, did some more research on the intake. Using a 1' bulkhead with a good sized strainer should put my worry of livestock getting sucked in to rest.

And dvenson I wanted a CL instead of power heads to cut down on crap in my tank and to have alternating flow without another device plugged in. I set up the scwd to see if I liked the flow, and I loved it.
So using CL with scwd saves me all the plug ins from 2-3 powerheads plus a controller and with creative use of locline will hide things perfectly.
Ill be trying to build a floating reef so the least amount of clutter in the tank the better.

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