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TROUBLESHOOTING
Problem
Green Algae
Black Algae
Unpleasant Odor
Burning Eyes
Colored Water
Hard Water
Description
1. Green water
2. Green spots on
surface
3. Slippery surface
1. Black spots on spa
surface
1. Chlorine-like odor
2. Burning sensation
in eyes
1. Water in newly
filled spa turns
black, blue or
brown when first
treated with ozone
1. Cloudy water
2. Scaling
Cause
Remedy
1. Low ozone,
1. Superchlorinate
bromine or
2. Brush spa (removing
chlorine levels
2. Low algaecide
3. Vacuum spa (removing
levels
4. Increase oxidizer
5. Increase algaecide level
1. Low
1. Superchlorinate
oxidizer
2. Brush spa (removing
levels
2. Low
3. Increase ozone, chlorine
algaecide
levels
4. Increase algaecide level
1. Combined
1. Balance pH to 7.2-7.6
chlorine;
2. Superchlorinate
2. pH out of
balance
1. Copper, iron,
1. Adjust pH to 7.2-7.6
or manganese
2. Run filter continuously
in water being
oxidized by
3. Vacuum settled material
chlorine or
4. Use sequestering agent
ozone
1. Excessive
1. Clean filter
hardness of
2. Filter continuously
makeup water
3. Adjust pH to 7.2-7.6
or building up
4. Use scale inhibitor
of dissolved
5. Dilute with makeup
minerals in the
water caused
by continued
use of spa
chemicals
6
algae)
algae)
residual
algae)
or bromine residual
and clean as required
for prevention
water
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