Question: After removing old paint from the concrete surface of a pool, how should you then clean the surface off?
Option 0: Clean it twice. First with an acid wash mixture of 5% water and 95% muriatic acid, followed by tri-sodium phosphate (TSP) to neutralize the acid and remove dense areas of oil or grease. Rinse it completely with pool water.
Option 1: Clean it twice. First with an acid wash mixture of 50% water and 50% muriatic acid, followed by tri-sodium phosphate (TSP) to neutralize the acid and remove dense areas of oil or grease. Rinse it completely with fresh water.
Answer: 1