Precipitation?

[Dw79]

I keep finding these random thin white chunks on on my sand. Could this be something precipitating out of the water?

 

[PeterC99]

Are you dosing 2 part. Do you see any of this on the heater or UV sleeve?

 

[Dw79]

Are you dosing 2 part. Do you see any of this on the heater or UV sleeve?

Not dosing and there is nothing on my heater. I have never found it anywhere but on top of my sand