View Full Version : Closed Loop pump selection?

02/07/2006, 06:58 AM
I am currently getting ready to setup a closed loop on a 180g. Its basically going to be 2 pumps running off of 2 holes drilled in the back.
Which 2 pumps out of these should I chose and why?

Iwaki WMD40RLT, Pan World 100PX-X, Little Giant - 4-MDQX-SC, Gen-X PCX-55HP or Gen-X PCX-40 (Mak4)

02/07/2006, 07:10 AM
Pan World 100PX-X and the Iwaki

02/07/2006, 07:15 AM
<a href=showthread.php?s=&postid=6684989#post6684989 target=_blank>Originally posted</a> by elephen
Pan World 100PX-X and the Iwaki

Is there a reason you chose those?

02/07/2006, 07:27 AM
I would look into running a dart with an OM 4-way. It will give you better circ and options in the long run I think. This is the setup I am going to use and am configuring shortly. I was going to use 3 smaller pumps on 3 separate intakes. I then switched to two intakes at 1.5" into the dart then out to the 4-way.

It would be about the same cost, but you would save on your electric bill a few $$ with this setup. The more I thought about closed loop design, the more I thought I was trying to complicate things.

02/07/2006, 08:46 AM
I agree with Black9ice...

We run a larger sequence 4200SEQ12 tied to an OM4-way on our 135g. The pump is fed by two 2" drains in the bottom of the tank and routed to four 1.5" return lines (2 over the top, 2 split from the bottom under the rock).

IMHO, the Sequence pumps are well suited for closed loop applications because of their size and efficiency.

The OM4-way is outstanding! I can't say enough good things about the service from Paul and Cassie.

Here is an early view of our closed loop design. It's slightly different now, but the concept is pretty sound.


02/07/2006, 08:52 AM
That is quite a better alternative then 2 pumps.

02/07/2006, 09:07 AM
maybe i will do that!

02/07/2006, 09:13 AM
<a href=showthread.php?s=&postid=6685582#post6685582 target=_blank>Originally posted</a> by elephen
That is quite a better alternative then 2 pumps. Another thing to think about how your power the system with a closed loop. If you can, run your CL off a separate breaker from what your sump return is powered. We setup our system with two dedicated 20Amp GFCI breakers. The CL and Halides are on one line while the sump return, skimmer, and VHOs are on the other. If one breaker or GFCI goes, we still have redundancy for lighting and water flow.


02/07/2006, 09:18 AM
i will have several 20amp lines run into the room. That isn't a problem.