Mt21

Hmm that is interesting. Should be no problem in the pool then, and an increased chlorine demand would also be a indicator....

We had discussed using dye, however the concern with that would be if its a small leak somewhere hard to see we may fill the pool with dye that lights everything up during shows...

Some really helpful replies here. To give you some more context we have a commercial performance pool with multiple moving hydraulic lifts to create various stage configurations. Our hydraulic heat exchangers began leaking very slowly over a long period of time which manifested as increased micro-bubble formation when the water is agitated. Not helpful for visibility underwater. So to prevent this from happening i would like to implement a daily or weekly test that would reveal increasing or decreasing trend of PAG in pool water samples. We dont really need exact ppm, just need to look for a leak if the trend is upwards. Although it would be nice to know at what point visible micro-bubbles start so we know how much to dilute with fresh water.

Hey who has some ideas on how to measure polyalkene glycol (PAG) in the form of neptune aw - 32 hydralic lubricant ppm in swimming pool water? It would be nice if its possible to do in a simplistic and repeatable way or if there is even some kind of process sensor that measures PAG. Cheers