Water quality and chemistry
Clear, safe water: what turns it green or cloudy, how chlorination and salt systems work, and which values matter.
2 entries
Problem
Green, cloudy or milky water: maintenance issue or equipment fault
Most green or cloudy water starts with chemistry: chlorine too low, pH too high or the water out of balance. If testing shows the chemistry is right and the water still will not clear, look at filtration and circulation, because a dirty or damaged filter, short run times or air in the system point to an equipment fault.
Last reviewed 24 Oct 2026
Equipment
Salt water pools and chlorinators: how they work, common faults and effects on stone and metal
A salt chlorinator passes lightly salted pool water through an electrolytic cell that turns the salt into chlorine, which sanitises the water and then reverts to salt. Most faults come from a salt level outside the maker's range, scale on the cell plates or low flow. Manufacturers warn that salt raises the risk of corrosion of metal parts and certain natural and manmade surfaces, so stone, grout and fittings need to be chosen and protected with that in mind.
Last reviewed 24 Oct 2026
