Does a salt water pool system cause residue or build up on waterfall rocks going into tile and grout along the waterline of pool?

Yes, a saltwater pool system can contribute to staining of the waterfall rocks, as well as the tile and grout along the waterline of the pool. The chlorine in salt water pools reacts with compounds found in many waterfall rocks, such as iron, copper, and manganese, causing them to dissolve and leave behind a staining residue. Additionally, calcium and magnesium ions in saltwater can form scale deposits on the surface of rocks and tiles, making them appear dull and discoloured. Regular cleaning and maintenance, such as brushing the rocks and tiles and maintaining proper water chemistry, can help prevent and minimize residue and buildup.