Tunze Osmolator - expected operation after power cycles

[ReefingIsMyTherapy]

Is it normal for the Tunze Osmolator to ALWAYS pump water after you switch it on, regardless of the water level?

Every single time that I switch it off and then switch it back on, it pumps water EVEN if the water level is above the optical sensor (i.e. the optical sensor is submerged in water).

 

[Calm Blue Ocean]

Is it normal for the Tunze Osmolator to ALWAYS pump water after you switch it on, regardless of the water level?

Every single time that I switch it off and then switch it back on, it pumps water EVEN if the water level is above the optical sensor (i.e. the optical sensor is submerged in water).

Yes, it always pumps after the power is turned on.

 

[X-37B]

The nano version does not but the optical one does.

 

[ariellemermaid]

Is it normal for the Tunze Osmolator to ALWAYS pump water after you switch it on, regardless of the water level?

Every single time that I switch it off and then switch it back on, it pumps water EVEN if the water level is above the optical sensor (i.e. the optical sensor is submerged in water).

Supposedly it’s to prime the line. I used to activate the float sensor on/off until it stops. However I eventually realized unless you have a very tiny nano tank it’s not enough FW to make any real impact on salinity and within half a day it’ll evaporate off anyway. So I just let it do it’s thing.

Along these lines, the high float sensor does stop the prime. So if you say had 1000 power cycles in a day due to bad power the high float still provides adequate backup protection for that situation.

 

[PghReef]

I believe it cycles through all its settings to name sure the system is working. This includes like a 10 second or so pump on to test its function before going off.

As mentioned above unless you have a 1 gallon tank it will be so miniscule it won't affect SG.

 

[ReefingIsMyTherapy]

Thanks everyone! I thought mine was malfunctioning, but good to know this is normal.

 

[muzikalmatt]

Thanks everyone! I thought mine was malfunctioning, but good to know this is normal.

If you have a smaller tank, you can open up the controller box and there's a little knob that you use can dial the flowerrate of the pump so it won't pump as much water on the initial power up. I did this on my 40g tank and it helped quite a bit with this issue.