Neptune atk issue

[LEOreefer]

hoping to pick everyone’s mind. I have a atk unit that I use to top off my tank with lime water. I believe it’s causing a film to form over the lower optical sensor and it’s causing the sensor to read closed all the time. When I go and whipe the sensor with a wet towel it kicks on. Has anyone had similar experiences with Kalk and optical sensors ?

 

[Daniel@R2R]

hoping to pick everyone’s mind. I have a atk unit that I use to top off my tank with lime water. I believe it’s causing a film to form over the lower optical sensor and it’s causing the sensor to read closed all the time. When I go and whipe the sensor with a wet towel it kicks on. Has anyone had similar experiences with Kalk and optical sensors ?

Mine's still working like a champ. Do you have a light that might be shining/reflecting on it causing algae to grow?

 

[LEOreefer]

Mine's still working like a champ. Do you have a light that might be shining/reflecting on it causing algae to grow?

Nope it’s in the sump compartment where there’s no light. I think it’s some sort of Kalk residue because it works for a day or so after I wipe it with me finger very strange. I’m going to refill my ato with plain RODI and see if the issue resolves itself