First of all thank you for this website, I am a new pool owner coming up on 1 year of ownership and I have not stepped one foot into a pool store thanks to you guys!!! On the wall of my pool I have swirl or darker areas than others. this is only on the walls as the bottom of the pool is a consistent blue.(plaster is Tahoe Blue) is this scaling??
To keep PH at this level I need to add about 1/2 cup Ma every 3rd day or so(is this normal?)