We bought a house with an inground plaster pool. We removed the cover today and drained the pool. There are crystals growing all over the pool walls and floor. I am a newbie at this so I have a lot of questions. I can remove the crystals with a scraper--have tried that and it works. If I use the power washer, it takes some of them off but not all of them. This is a chlorine pool, not a salt water pool.
1) How can I remove the crystals?
2) What causes crystals to form? The crystals are thicker toward the top
of the pool--about the top 3 feet. They are brown but when I powerwashed areas, it appears to make the brown go away and leaves some of the crystals.
Any and all help is most appreciated!