Problem

Probable Cause

the Robelle remedy

Water is green, walls and surfaces around pool have become slimy and slippery (water may also be cloudy).

Algae growth.

Adjust pH, then treat with Robelle Shock Treat.  Keep filter running and vacuum dead algae.  Add Algaecide as directed.

Water is green, but clear.

Low pH.

Add Robelle pH Rise until pH is 7.2 to 7.6

Green or reddish-brown water.

Iron or Copper.

Adjust pH, then add Robelle Iron-Away and Robelle Clarifier.

Water is cloudy or hazy.

1. High pH.

2. Minerals (calcium or magnesium) in water.

3. Faulty filter.

1.  Add Robelle pH Lower until pH is 7.2 to 7.6

2.  Adjust pH, then add Robelle Iron-Away and Robelle Clarifier.

3.  Check sand filter for channeling and calcification.  Check diatomite or cartridge filter for clogged or cracked elements.  Backwash filter.

Water is cloudy and hazy, with rapid rise in pH within 2 to 4 hours.

Early algae growth.

Add Robelle pH Lower until pH of 7.2 to 7.6 is reached, then treat with Robelle Shock Treat.  Add Robelle Algaecide.

Eye or skin irritation.

Poor pH control.

Check pH with test kit and adjust with either Robelle pH Rise or pH lower until pH is 7.2 to 7.6

Eye and skin irritation, with strong chlorine odor.

Chloramines.

Adjust pH until 7.2 to 7.6 is reached, then treat with Robelle Shock Treat.

High chlorine consumption.

1.  Heavy bathing load, high temperature, heavy rain, or wind storms, low pH.

2.  Chlorine stabilizer level too low.

1.  Adjust pH until 7.2 to 7.6 is reached.  Superchlorinate with Robelle.  Shock Treat.  Repeat if needed.

2.  Have chlorine stabilizer level checked.  Add stabilizer if needed.

Low flow rate and poor water clarity with diatomite filter.

1.  Clogged feed pump or hair trap.

2.  Broken filter element.

1.  Remove foreign material.

2.  Replace element.