If algae growth is a constant problem, look to fix the underlying cause. Try following this
Check the water circulation is strong enough to prevent stagnation.
Ensure pool water is chemically balanced (see "chemically
balance your pool"). Ensure chlorine levels stay high. Under normal circumstance, algae will not survive in
chlorinated water greater than 2 ppm and with good water circulation.
Remove possible contamination from entering the water (vegetation, leaves, etc).
Re-align pool jets to move water in a circular direction, pointing downwards to move water on the
bottom. Seeing a jet move water on the surface of the water may look pretty, but is doing very little
to assist in circulation.
Get a water sample checked for Phosphates at your local pool store. Phosphates is
basically food for algae spores, and is becoming a larger problem due to fertilizers being used in residential
or commercial use, and washed into the water supply. If this is the case, add a Phosphate treatment. I
recommend a product called Phosfree by Natural Chemistry.
If problems still persist, obtain a PoolRX - a pool mineral
additive which resists algae and visibly improves water quality. This can be a
'miracle cure' for trouble pools. I use them in a handful of pools to reduce chemical costs and
maintain good water quality.