Pump mod advice on CPR backpack PLEASE!

[TexasTodd]

Hey, thanks for looking.

I need to find a way to adapt a better pump, say a Mag 3, to work with a CPR backpack. The rio pumps just suck and go out every 3 months or so.

If possible I'd like to overdrive the skimmer with a Mag 3 or 5 and use the pump externally. I could plumb it, but how do I get air in to the line feeding from pump to skimmer?

Thanks,

Todd

[bronco1500]

Maxi jets work well and a good price. I think a mag 3/5 might be too much for the little backpack

[TexasTodd]

Great, how do you convert them to draw the air etc?

I agree Maxi Jets are very good.

Thanks,

Todd

[bennyinca]

I agree with the previous post on the maxijets. Keep in mind that too much flow can give you lots of tiny air bubbles i the return.

[TexasTodd]

Great, where can you get one that is modified for the back pack?

Or, how do you modify it yourself?

Thanks,

Todd

[bronco1500]

It does not need mods. It comes with an attachment to allow air into the intake of the pump. I think that this is a pretty common mod to trash the rio and replace with a maxi.

[doxyman]

Todd, I used this modification on a Bakpak a few years ago and it worked great. What you need to get is a venturi kit for the MaxiJet such as this:Venturi (http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=PA&Product_Code=MJ-VENT&Product_Count=&Category_Code=)

Or just mod the MJ using the spare parts that came with it:
Venturi Modification (http://archive.reefcentral.com/forums/showthread.php?threadid=56425)

IME I found that using a MJ900 or 600 on the Bakpak performed the best. I tried the MJ1200, and for me, it was too much flow thru the skimmer which reduced the contact time.

HTH

[TexasTodd]

Doxyman, JUST WHAT I WAS LOOKING FOR!

I knew that there had to be a good thread out there.

Thanks,

Todd