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Old 04/07/2021, 05:10 PM   #1
Registered Member
Join Date: Jun 2010
Location: Jonesboro, Ar
Posts: 276
DIY magnetic stirrers

I posted earlier that I was in the process of making a DIY magnetic stirrer. I've got it finished and here are the pictures I took along the way, with a few comments. I've got to say it works perfectly.

here you go....

This is the fan motor taken out of the exhaust fan, bottom side

Same picture but the top side of fan.

This shows the original kalkwasser (stirrer) I started with.

This elbow has to be cut off because it isn't used anymore and it's just in the way of the magnetic stirrer.

This image shows the polycarbonate I used as the "holder" of the motor assembly.

After making the box out of plywood and putting it together this picture shows the motor assembly in the box.

I measured, and found the center of the old kalk stirrer. NOTE: it is better to have the motor and the magnets as close to concentric as possible. It will make for a smoother operation.

A picture of the completed unit.. You'll see the two red objects, they are plugs. The PVC fittings that the original kalk stirrer was plumbed with are metric fittings. I couldn't find but in one place. I ordered them and when they arrived they were too big, so I made my own.

Completed with the stirrer half full of water and running. Light at the end of the tunnel!!

This shows the stirrer with a little kalk powder in it. Works really well.
For some reason I did not show any pictures of the magnets glued onto the fan base. If anyone wants pictures of that, or where and what kind of magnets I used I will be more than glad to get that for you. My son was remodeling his bathroom and wanted a new exhaust fan with a light. He was going to throw the old one away, so that came pretty cheap.
Anyway enjoy. I hope I have these in somewhat of a decent order.
Let me know what you guys think.

In wall 240 gallon reef with starfire front, 125 gallon sump, Ca reactor, Kalk reactor, Digital Aquatics controller, Octoreef 200 skimmer, 2 reeflo pumps moving things around in the display tank.

Last edited by wilsonreefs; 04/07/2021 at 05:37 PM.
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