Here's an overview on pool care in general with step-by-step guidelines.

PROBLEM: Black Algae

ANALYSIS:
Black algae is a blue-green filamentous algae that grows on rough surfaces of concrete and plaster pools. It usually appears as black slippery spots on the pool wall. If not checked, it grows into a dense black mat. The most common cause of black algae is a low free available chlorine level, which may be due to heavy rains, high bather loads or poor pool maintenance.

SOLUTION: Pool Time Algicide Plus

• Check the pH and adjust (if necessary) to 7.2-7.6.
• Vigorously brush away any visible algae.
• Vacuum pool surfaces and backwash to remove as much debris as possible.
• Following label directions, add Pool Time Algicide Plus (for all pool types).
• Allow Algicide to work overnight. Then brush and vacuum pool surfaces. Backwash the filter to remove accumulations of dead algae and debris.
• For major infestations, a second treatment may be needed.
• Return to normal maintenance with Pool Time sanitizers, shock products and balancers.
• As an algae preventative, add Pool Time Algicide Plus or Non-Foaming 60% Algicide per label directions for preventative maintenance.

(For detailed product information, go to Algicides.)

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This analysis is designed for use only with the Pool Time® brand products named in this computerized water analysis printout, and is correct to the best of RWP, Inc.'s knowledge. RWP is not responsible for any use of this printout with products other than the Pool Time ® brand products named in this printout, and use of this printout with other products could result in improper or incorrect treatment of the pool water.