Pump

[da2145r]

My first time setting up a sump on a tank. So I got a hob overflow box which is rated 800gph and I plumbed with those grey tubes and my return pump is 850 gph. My tank to me doesnt seem to be working properly can someone pls help me on what to do thank you

Sent from my SGH-M919 using Reefs

 

[edd]

you need to explain what you mean by not working properly.

 

[da2145r]

The water is coming into slowly so slow it barely reaches the return I was thinking that maybe my pump was to strong but what do you guys think the problem is?

 

[edd]

sounds like the pump isn't strong enough. you have to look up a curve chart to see what the head pressure rating is, how high is the return above the pump.

 

[cody0709]

You have to check, 850 gal return plumbed in with rise is probably only 600.

 

[da2145r]

So should I get a stronger pump or weaker

 

[KathyC]

For discussion purposes I am attaching a link to the flow chart for Mag Drive pumps:
http://www.melevsreef.com/magdrive.html


A pump that claims to pump 850gph is getting that figure from straight from the output end of the pump. For each foot of PVC you attach, you lose 'X' amount of 'head' pressure (what is coming out of the output end). For each elbow and bend in the plumbing, you lose even more pressure, and if you split the return line into 2 returns, even more.


What size is your tank?
Can you post a pic of the way you have it plumbed?

 

[da2145r]

Its a 75 and I didnt use pvc to plumb, I used those clear tubes for my return

 

[cody0709]

Even clear PVC has head pressure- you need a bigger pump

 

[da2145r]

How big because my overflow is 800gph

 

[da2145r]

My hob overflow box is 800 gph how strong should my return pump be

 

[cody0709]

You have to measure length or pipe and height, that is what creates head pressure

 

[da2145r]

Ok