image.jpgimage.jpgI maintained my moms pool for 20 plus years. It was concrete then plaster. Very basic no extras.
I never had to add water (due to evaporation). I would go six months or more never adding water.
Sooooo. My current pool is concrete that looks like beach sand. Rock waterfall about ten feet wide and four feet tall. Built in spa with overflow of about a half inch.
I did have leaks that are fixed now. I am currently loosing a inch and a half per week. I know everywhere says evaporation could be as much as a half inch daily. I don't believe this to be all my problem. Either I still have a small leak OR.......I believe that where my flagstone rocks of my waterfall are 2-3 inches below the water surface that water is being held and even climbing up to 3 inches up the flagstone. I say this because overnite with out the pumps running I can see wet rock 3 inches above the waterline and then dry rocks the rest of the way up.
So I think the more porous, absorbing flagstone rocks are causing water to rise up the stone therefore causing extra evaporation off those rocks.
So my question is...would this theory be correct? And would a coating of clear resign applied to the rocks below the water level and upwards of a inch or so keep the rocks from absorbing the water and causing it to rise and the evaporate? Or was my moms pool a fluke of nature? (UPWARDS OF SIX MONTHS OR MORE WITHOUT ADDING WATER.)