13
CHECKLIST WHEN PROBLEMS OCCUR
Problem
Possible Cause
Chlorine Residual
Insufficient running times
Low or Nil
pH too high or low
Strong sunlight and low conditioner levels
Poor circulation
Heavy bather loading
Low chlorine production
Chlorine Production
Low salt levels
Air in cell casing
Low or Nil
Scale build up on the cell
Faulty circulation
Algaecide addition within the last 2 to 3 weeks
Cell leads incorrectly connected
Debris levels in the pool too high
Cell too old and worn out.
Chlorine Levels High in mornings and low
at night
Heavy bather loadings
Extreme sunlight conditions
Insufficient pool conditioner levels
pH alters rapidly and easily
A low total alkalinity level in Marblesheen, pebble or tiled
pools.
Contamination with debris especially urine could be another
cause.
Poor circulation
Dirty and clogged filter
Hair and link baskets full or leaves at the skimmer boxes or
pump
Faulty pump
Water levels is low or cell is clogged with scale
Short intervals between backwashes
Ineffective backwashing
Body fat or oil build up on pads. With Diatomaceous earth
filters the cause may be insufficient diatomaceous earth over
the pads.
Cloudy water
Insufficient filtration times
Holes in the filter pads
High pH
Pool walls need brushing
Main drain not working
Algaecide’s have been added in the last few weeks
Bather load too great for filtration and chlorine times.
Low salt level
The results of splash out by bathers
Heavy overflow from rain or accidental filling of the pool
Topping up because of pool leaks or from excessive
backwashing
Appearance of Stains
Low chlorine levels
High pH levels
Poor circulation
Infrequent brushing of the pool walls
Incorrect total alkalinity
Algae Formation and High Chlorine Levels
The pH is over 7.4
The pool conditioner level is too high
Frequent Cell cleaning
Hard bore water being used
Incorrect total alkalinity levels in Marblesheen, pebble, tiled or
heated pools
pH levels may also be too high
Prior to the CHLORINATOR and currently, are you still
adding powdered chlorine?
