mag drive 12

[okiestranger]

I was looking at all my stored equipment and I came across what I believe is a Danner Mag-Drive Supreme 12 - 1200 GPH Pump

[okiestranger]

Is this ok to use in my sump it feels metal. I typed in the numbers on the back and it keeps coming up as a Danner mag 12

[Reefing Madness]

I would not use that one, unless you use it external. You don't want metal in the water, and the saltwater will chew through that in no time.

[FoMoCo Master Tech]

Wow, i didn't know some mag drives had metal housings. Kinda odd.

[FoMoCo Master Tech]

I see the pic shows metal screws. I wouldn't use it. Are some mag drives external only?

[Reefing Madness]

I see the pic shows metal screws. I wouldn't use it. Are some mag drives external only?

Ones made for ponds have all the metal and screws in them.

[okiestranger]

Yeah I was just curious because this is the pump that came with my 150 cube as the submersible for the crappy sump that came with it. The instructions said to place it in the sump.

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[kevinpo]

Hello,
It is not metal except the stainless steel screws and is safe to use in your tank or sump. It is sold by Eugene Danner Co.

Regards,
Kevin

[okiestranger]

Really that's cool. I'm just real nervous about putting something in my tank that's bad. But I want to thank everyone who posted with replys

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[FoMoCo Master Tech]

I learn something new every day. Any metals near the tank makes me nervous though.

[FoMoCo Master Tech]

Wait... I just remembered my skimmer pump has stainless steel screws holding the cover on.

[okiestranger]

This makes me wonder a few things I work with stainless alot I can fabricate and weld stainless as I work in maintenance in a food production factory. What grade stainless is ok for saltwater? We use a 80% salt brine solution to cool product. All housed in massive SS ovens the grades we use are 302 and 316

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[kevinpo]

Hello,
316 will hold up best but it is still not advised to use large amounts submerged as over time it will still corrode just not nearly as quickly. The reef tank environment is more corrosive than sodium chloride solutions. This is due in part to the high oxygen content we strive to maintain, micro organisms, and other minerals that oxidize metals.

Regards,
Kevin

[okiestranger]

Thanks Kevin.

I did find some more info on the mag 12. Seems alot of folks have used this for a return pump and seems to be reliable. I plan to use this for my return and also t off and feed my Skimmer. Thanks for the info greatly appreciated.

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[kevinpo]

I have sold more than 25 of them over the last 8 years and they average 5-7 years of operation. The Mag 9.5 is the one I sell the most of. More than 50 over the same time period. It has the same lifespan. The Mag 24 and 36 run a bit noisy and generate quite a bit of heat for my taste. 99% of users run Mag Drive pumps submerged rather than external. Years ago they were mostly used for ponds and only the salt water versions had the SS screws. Now all of them have SS screws. The only difference between the two is the power cord length. The pond model has a longer one (15').

Regards,
Kevin
PS: If you need to buy an impeller assembly be sure to check the revision number. It will be found on the label after the pump number. IE. Mag 9.5A or the newer 9.5B

[FoMoCo Master Tech]

If I remember correct (when I was choosing a return pump) the manufacturer's website recommended using the mag drives internally as opposed to externally. I could be wrong though.

[kevinpo]

If I remember correct (when I was choosing a return pump) the manufacturer's website recommended using the mag drives internally as opposed to externally. I could be wrong though.

Cooling is improved when run internally. Also when run externally you can get some salt creep from the impeller housing O ring. A good coat of silicone grease on the O ring will fix it.

Regards,
Kevin