Hi Everyone
I just completed an owner builder Gunite/SWG pool project in March in central Florida. Using the pool everyday and loving it. Water looks and feels great. I test water daily/weekly and most of the time everything is where it should be. However I have an annoying white “stain” around the bottom of the pool. Nothing on the sides. I have attached an up close pic. I have read about calcium etching and calcium scale. Neither seem to fit what I am seeing. Plaster contractor said keep adding acid and brushing. He couldn’t identify it specifically. I contacted manufacturer of aggregate and they referred me to contractor. Anybody have any ideas?? Top of pic is what pool should look like, bottom half you see the white stain/buildup...
Thanks
I just completed an owner builder Gunite/SWG pool project in March in central Florida. Using the pool everyday and loving it. Water looks and feels great. I test water daily/weekly and most of the time everything is where it should be. However I have an annoying white “stain” around the bottom of the pool. Nothing on the sides. I have attached an up close pic. I have read about calcium etching and calcium scale. Neither seem to fit what I am seeing. Plaster contractor said keep adding acid and brushing. He couldn’t identify it specifically. I contacted manufacturer of aggregate and they referred me to contractor. Anybody have any ideas?? Top of pic is what pool should look like, bottom half you see the white stain/buildup...
Thanks
Maybe 
