Problem Possible Cause Check / Remedy
Green / cloudy water / slippery sides
Algae Shock dose with chlorine (see start up dose) and add algaecide.
Too much chlorine Overdose Allow time to naturally dissipate or buy a chlorine reducer.
pH hard to control Alkalinity low Seek advice on how to raise total alkalinity.
Can’t maintain chlorine levels Chlorine demand of water too high at start up, after holidays or due to excess contamination or neglect Shock dose with chlorine (see start up dose) and repeat after 24 hours if necessary.
Cloudy water Poor chemical control or inadequate filtration Clean cartridge, check chemical levels and adjust chlorine / pH if necessary.  If problem persists buy a pool clarifier to remove small particles.
Rough pool sides / Pool liner feels rough Scale formation due to high calcium levels in water Ensure pH levels are correct and use a pool scale inhibitor to stop calcium precipitating out of water.
No colour change on test strip / dip test Levels of chlorine too high leading to bleaching of indicator pads (over 15ppm chlorine) Wait for chlorine level to drop and re-test.
Foaming Detergent present from incorrect cleaning products or excessive algaecide use Reduce water level and top up with fresh water.  Avoid domestic household cleaners.