Just got a house with a concrete in ground pool about 50,000lt. After a few dasy the water started to have a green tint so we took a sample to the pool and spa specialist in town. They instructed to put 8kg of Sodium Bicarbonate, after an hour 570gr of Ph increaser, after another hour 3 kg of power chlorine and then after another hour 1kg of copper based algey killer. Brush pool filter for 24 hrs and then stop filter for 24 for dead alguie to settle and vacume. We followed instructions and today when we started vacuming realized that the color of the pool walls and bottom got from white to gray.
I would suspect that something with the PH is wrong but no idea. Will get another sample of water to pool specialist tomorrow but not confident they are competent to help after what happened.
Anyone any idea why the color of the pool paint could change and get darker? Is that serious damage? Will we need to repaint?
all help appreciated