Tunzee nano keeps overfilling.. odd

[Jake_the_reefer]

So I have a tunzee nano on my Im fusion 10g and the weirdest thing happens every time I fill the top off resivior. When I refill the resivior it desides to start running and fills the tank 3 inches over where the sensor is then stops. Then evaporation happens and once it gets to the sensor it starts working properly and every time the top off over fills it stops at the exact same spot around 3 inches over the sensor. I'm not worried about salinity dip because it seems it only drops like .001 - .002 from this. The issue is because then the water level is higher than my filtersock so a lot of the waste just bypasses the sock entirley.

Could it be an air bubble in the sensor cap? I dont think its magnet related cause the nearest interfering magnet is 3 inches from the sensor.
I had an issue with the tunzee nano in my 20g where the float sensor was stuck from going down due to an air bubble so I drilled holes in the guard and that helped.

Any ideas?

 

[Jake_the_reefer]

Heres another tidbit. The first thing that would come to mind with it acting odd after refilling is thinking the pump was running dry first but no I always fill the resivior when its half empty so the pump never can run dry and this only happens after refilling. Sooooo I have no idea...

 

[ndrwater]

Maybe give the float a good scrub. Bubbles, bio film, algae can all wreak havoc with float switches.
I have both the nano and the regular Tunze ATO. I definitely prefer the regular.
I also know there is a manual dial inside the controller box of the 3155 to allow how long the pump actually runs. Not sure if it's the same in the nano, but it might be worth a look inside. The little dial is red if I recall

 

[Jake_the_reefer]

Maybe give the float a good scrub. Bubbles, bio film, algae can all wreak havoc with float switches.
I have both the nano and the regular Tunze ATO. I definitely prefer the regular.
I also know there is a manual dial inside the controller box of the 3155 to allow how long the pump actually runs. Not sure if it's the same in the nano, but it might be worth a look inside. The little dial is red if I recall

I dont think it has a dial.. I'll look at the internals tho.

 

[Jake_the_reefer]

Okay, so the sensor is perfectly clean after unplugging and plugging in it kicked on again. Even tho the sensor is submerged. I took it out completely and put it in the display of the tank and for some reason now it's now acting correctly. Something was interfering and I'm not sure what

 

[Moxtrain]

Maybe give the float a good scrub. Bubbles, bio film, algae can all wreak havoc with float switches.
I have both the nano and the regular Tunze ATO. I definitely prefer the regular.
I also know there is a manual dial inside the controller box of the 3155 to allow how long the pump actually runs. Not sure if it's the same in the nano, but it might be worth a look inside. The little dial is red if I recall

There's either something holding up the float switch or the pump is running for it's Max run time and stopping itself. I suspect it's running full open until the pump times out. That would explain why it filled to a repeatable level. If it was just the float getting stuck I bet it would fill properly every now and again.

 

[ndrwater]

I do know that no matter the water level with either type of sensor, that the pump will turn on for at least a partial cycle if the power is interupted.

 

[Dempsey941]

I read the magnet that sits on the outside of the tank can mess with the float switch and that people put a piece of cardboard between the outside magnet and the glass and that solved the issue. That may or may not help in this situation.

 

[Jake_the_reefer]

I do know that no matter the water level with either type of sensor, that the pump will turn on for at least a partial cycle if the power is interupted.

Okay so I think I found out the reason and I am an idiot for it. I'm thinking it's the reason but not 100% I just cleaned it and accidentally put the magnet backwards. This forced the sensor to be stuck downward in the on position. I have it assembled correctly now. Perhaps that's the solution

 

[Jake_the_reefer]

I read the magnet that sits on the outside of the tank can mess with the float switch and that people put a piece of cardboard between the outside magnet and the glass and that solved the issue. That may or may not help in this situation.

That's an excellent idea because I think the problem may be magnet related

 

[ndrwater]

Okay so I think I found out the reason and I am an idiot for it. I'm thinking it's the reason but not 100% I just cleaned it and accidentally put the magnet backwards. This forced the sensor to be stuck downward in the on position. I have it assembled correctly now. Perhaps that's the solution

If I had $1 for every time I have made a simple (stupid?!?) Mistake when working on my tanks, I would buy Peru... It happens. Glad you seem to have gotten to the root of the problem...

 

[Jake_the_reefer]

Evaporation will quickly fix the water level which is nice It took 2 days to fix the water level naturally last time.

 

[Jake_the_reefer]

If I had $1 for every time I have made a simple (stupid?!?) Mistake when working on my tanks, I would buy Peru... It happens. Glad you seem to have gotten to the root of the problem...

My dumbest moment was when i first started this aquarium I (noob me) decided it would be smart to use a metal paperclip as a makeshift hoseclamp in the tank. 5 months later I found a rusted paperclip and I thought "what was I thinking!"

 

[ndrwater]

My dumbest moment was when i first started this aquarium I (noob me) decided it would be smart to use a metal paperclip as a makeshift hoseclamp in the tank. 5 months later I found a rusted paperclip and I thought "what was I thinking!"

I actually laughed out loud at that one... It's the little things we learn along the way that makes this hobby so rewarding and frustrating..

 

[Jake_the_reefer]

I actually laughed out loud at that one... It's the little things we learn along the way that makes this hobby so rewarding and frustrating..

I was shocked haha, long story short... my corals are growing faster than they ever have