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Questions

Visit Water Chemistry 101 for a better understanding of the terms used on this page.

Problems Causes Solutions
Algae present in pool.
Chlorine level is too low.

Algae has become immune to regular maintainence levels of chlorine.
High phosphate.
Pool equipment is not filtering and/or circulating properly.
Equipment is not running long enough to properly turn over the water.
Add more tablets to the floater and/or open the vent more on the floater.
Shock the pool.


Add phosphate treatment or drain and refill.
Make necessary repairs to equipment. Clean filter, back wash if possible.

Increase run times on equipment.

Skin and/or eye irritation
Ph is not balanced correctly
Chlorimine level is too high.
Alkalinity is low, making it difficult to maintain proper Ph level.
Balance Ph between 7.4 and 7.6
Shock the pool
Adjust alkalinity between 100 and 160 ppm.

Cloudy water
Algae is present in the water.
Ph and/or Alkalinity is too high.
Calcium hardness is high.
Total Dissolved Solids are high.
Shock the pool.
Adjust to proper levels.
Drain all or part of the pool and refill.
Drain all or part of the pool and refill.

Stained plaster
Ph too high or too low.
Alkalinity too high or too low.
Calcium hardness too high or too low.
Cyanuric acid too high.
Equiment not working properly.
Balance Ph.
Adjust alkalinity.
Drain all or part of the pool and refill.


Make necessary repairs.

Excessive chlorine use
High Ph.
Low cyanuric acid.
High cyanuric acid.
Balance Ph.
Add cyanuric acid.
Drain all or part of the pool and refill.

Etched or rough plaster, premature surface deterioration.
Low alkalinity
Low Ph
Adding too much acid at one time.

Pouring acid over step or bench areas or the shallow part of the pool.
High cyanuric acid
Adjust alkalinity.
Adjust Ph.
Add small amounts at a time. (1 quart for pools 4 ounces for spas).
Only pour acid in the deep end away from the skimmer with the equipment running.

Drain all or part of the pool and refill.
An acid wash may help even out the discoloration. If the plaster is excessively stained or discolored then a replaster may be needed.)

Discoloration around fittings, jets and/or floorheads.
Tablets added to skimmer.
Acid poured in too close to skimmer.
Automatic chlorinator set too high or not working properly.
Only add tablets to a floater.
Only pour acid in the deep end away from the skimmer with the equipment running.
Make necessary adjustments or repairs.