Mag 5 and air bubbles

[Fijikid]

:?: Hello,

I am currenlty using a Mag 5 with my CPR overflow feeding a 29 gallon sump. The water flow down to the sump and through is not sufficient enough and the Mag 5 is drawing air and water back in the display tank. I am thinking that the Mag 5 is too powerful for my set-up. I currently have a shut-off valve on the return line to regulate the flow back, but that is even turn down fairly low,

Any suggestions on how I can have the valve fully open and not have the pump pulling air back into the display tank?

Thank you,

 

[iamjosh]

Depending on how much your CPR over flow can feed the sump, maybe you can raise the level of the sump.

When I had my smaller sump if i lost more then 4 gallons water It would draw air.

Maybe you can use a elbow to point the pull of the water towards the bottom of the sump rather then near the surface as long as there isn't sand near by.

hope that helps.
-josh

 

[wrightme43]

What size Cpr is it? A mag 5 flows 500 gph at 0 feet head. at four feet I think its like 350-375 gph. The smallest Cpr 3/4 " bulkhead will flow 300 gph. That could be the problem. If the Cpr can handle 600 or 800 gph. You should do like Josh said, take a line out from the intake, put a 90 on it, do not glue it. Make it almost touch the bottom of the sump. Drill holes all around the bottom of the 90 as close to the bottom of the sump as you can. This way it will pull water from the bottom only and not pull any air. If you can post a photo of your sump and model # on your cpr. Make sure you can slip the 90 off for maintence. Try shutting off your pump and seeing how much water fills your sump. Make sure the water is not coming from your return line though the pump and overfilling your sump. If so drill a small air break hole in your return where it meets the water. Drill this hole at a down angle into the tank so water does not spray everywhere. CHECK THIS HOLE EVERY WEEK!!! Then you can raise the water level in your sump, no more sucking air. HTH. STEVE

 

[Katchupoy]

I have Mag 5. Is it inside the sump or outside the sump? If its inside... is it sucking air because of too low of a water level? Or if its outside, maybe you have a joint somewhere that is not glued properly? Which setup is yours?

 

[Fijikid]

Hello,

Thank you all for your feedback. I added a 90 degree fitting (so the water is being sucked in from the bottom) to the mag 5 and so far its seem so have taken care of the issue.

Thanks again

 

[Katchupoy]

good... very good...

 

[wrassehole]

will the length of the hose help determine the flow rate as well or is it only head?

 

[Katchupoy]

i think length is minimal as long it is not exagerated.
It is more on the head height.

 

[snobanker]

On a different note....I thought you wern't supposed to run Mags externally??

 

[wrightme43]

Yes, Mag recomends against running external with saltwater.

 

[Katchupoy]

Yup, there are so many here running it without problems. Some have leak problems but thats it. If you can use it internal, good for you, and a 90 degree elbow on the suction area facing down is a very good idea.

In my case, I cant because, I installed Kent Float Valve inside the last chamber of my sump which just barely fit my mag.

 

[wrightme43]

See thats good to know. Cesar, how long do they usually last external? Your tanks look great, so I know you know what your doing. Have you ever considered the quiet one pumps. I am having good results with it. It really is the the quietest pump I have ever seen. Thanks man. Steve

 

[Katchupoy]

Steve. I dont have noise/sound issues with my mag 5. I can only hear my skimmer and some snails when they are in my maxijets.

It is very annoying and also interesting too to see these snail go in between my maxijets and glass. As if they are doing it intentionally to make sound. Their shells will hit the glass really really close as to a point that it wil make a tak tak tak tak sound because of the vibrations being made by the maxijets....