Osmolator Nano consistently overfilling

[MisterTang]

Good evening, all!

To cut to the chase, I have an Osmolator Nano that for the last six weeks or so has consistently overfilled to the point that the auto-shutoff kicks in. This evening, it filled my brand-new Innovative Marine tank so high that the skimmer overflowed and dumped goop, and I'm officially fed up with the unit. I took a photo of the current water level, and if I had it plugged in, the stupid thing would still be pumping away, despite the water level obviously being an inch and a half over the sensor.

Did I just get a defective unit? The Osmolator Nano gets such good reviews, I feel like I must either be doing something terribly wrong, or I got a defective unit.

It does not have any apparent salt creep or other obstruction inside the sensor when I pull it out.

 

[rvitko]

An overfill will be caused by one of 3 issues.

1) A siphon, if the reservoir water level is above the end of the hose where it clamps to the tank, this is the likely culprit and the reservoir needs to be moved below the tank.

2) The float succumbed to magnetic interference, it is a magnetic switch, the black ring in the float is a magnet and it actuates a switch in the post. A nearby magnet cleaner or holder can prevent it from working. It is also possible for the magnet holder of the float switch to pin it down, this is most common on glass less than 1/4" thick. A simple shim of 1/8" thick acrylic or rubber between the outside magnet and the glass will solve this so their is enough space for the magnetic field to be cancelled out.

3) The unit is defective.

 

[MisterTang]

An overfill will be caused by one of 3 issues.

1) A siphon, if the reservoir water level is above the end of the hose where it clamps to the tank, this is the likely culprit and the reservoir needs to be moved below the tank.

Definitely not this. The unit is directly under the tank.

2) The float succumbed to magnetic interference, it is a magnetic switch, the black ring in the float is a magnet and it actuates a switch in the post. A nearby magnet cleaner or holder can prevent it from working. It is also possible for the magnet holder of the float switch to pin it down, this is most common on glass less than 1/4" thick. A simple shim of 1/8" thick acrylic or rubber between the outside magnet and the glass will solve this so their is enough space for the magnetic field to be cancelled out.

Probably not this. There are no magnets directly around the Osmolator Nano; the closest thing is a return pump, which probably doesn't generate enough of a magnetic field to affect the switch.

3) The unit is defective.

I sure hope not :uhoh2: I've only had it since July! If this is the case, do you guys prefer I contact Salty Supply, the vendor I got it from?

 

[rvitko]

Their is a magnet, the one that is holding the float itself can be a cause if the glass is less than 1/4" as I mentioned. Is the controller (small black box) possibly near a ballast or magnet, it can also be vulnerable to magnetic fields? Any warranty service would be directly through me.