How do you run your circulation

[mike_cmu04]

i have always used powerheads and have always liked the results

 

[CAReefer]

I run 2 tunze 6100's on a 7094 controller. In addition 1270 gph return pump on Ocean Motion Super squid with 4 corner outlets.

 

[cracker]

I have a Calfo type closed loop with a Mag 36

 

[Craig Manoukian]

How big is your tank cracker?

 

[cracker]

Craig,I have a 200gl. For NOW I'm running the 36 externally.intake is a 1.5" bulkhead ,1.5 " return up the back and a 1.25" ring with 10, 1/2" outlets. I appear to get good flow with it. Having to experiment for best volume versus flow.

 

[Craig Manoukian]

Thanks cracker! What is the Mag 36 rated at for max flow?

 

[cracker]

The 36 is rated at 3600 gph at 1' My prob is ithe Mag 36 isn't listed on any head loss charts. I called Danner, now get this ,The rep I spoke with wasn't able to come up with a pump curve chart and never returned my call! So I really have no idea what kind of flow I'm getting.I'm experimenting with differant manifolds of varying diameters and number and sizes of outlets.

 

[Craig Manoukian]

Thanks cracker, let us know what you find through expiramentation.

 

[cracker]

Well I was Ah, hopin for a little insight from You Guys :makefun:

 

[MINIATUS]

Cracker does this help.

MINIATUS

 

[Craig Manoukian]

Way cool Min! With 6 feet in head, you have a net flow of 3,000 GPH. 6 feet of head is about average depending on the height of the stand and the number of 90 degree elbows in the return line/manifold.

 

[cracker]

Thanks Min. The chart listed is based on the 1" outlet diameter on the MAG 36. What happens when You increase that to 1.5" or even 2" pipe? I should not have used the term Headloss Chart. I meant Head Loss Calculator like the one at RC.
http://www.pricepump.com/pumpschool/Column_with_Contents.htm

 

[MINIATUS]

will this calculator work. It has pipe diameters included.

MINIATUS


http://wtmrac.org/tools.htm

 

[cracker]

Again The Mag 36 isn't on the list of pumps.

 

[Craig Manoukian]

The MD36 is the red line in the above graph, isn't that the model you have - a Mag Drive 36?

 

[cracker]

The headloss calculator at RC needs Specific INFO on each pump on the list to figure changes in pipe diameter. I think it's a pump curve chart.
http://www.pricepump.com/pumpschool/...h_Contents.htm
Please check lesson two
The flow rate chart MIN posted uses the output diameter of the pump to figure gph/ height.
Increasing diameter of the return side greatly improves the pumps performance. But the headloss calculator at RC doesnt list the Mag drive 36 so doesn't have the specific info needed . I apologize for the confusion and if I'm missing something please tell me. Min ,Froggy at RV can explain it a lot better than I! He has a gift for explaining pump issues in clear understandable terms.

 

[MINIATUS]

So if i understand this right, having a larger diameter on the return will give less restriction therfore less head loss. This would then allow more flow thru the manifolds. Im I on the right track.

MINIATUS

 

[Craig Lambert]

400 gph from my external return pump (I like slow movement through the sump), two seio 820's. 75G tank.

 

[cracker]

Min, YES! Larger diameter pipe increases GPH up to a certain point.Please consider looking into this subject further. Did I blow the link I posted? There is real good info there.

 

[lcstorc]

I get "page not found" on the link.
Thanks
Lynn