How fast your water gets dirty depends on many factors: 

• How much use the pool receives • Skin care products like suntan lotion etc. 

• Dirt or grass brought into the pool from swimmers, recent storms etc. 

• Forces of nature; pollen, leaves, dirt etc.  

• If your pool has a cover.

• Chemicals being properly balanced.  

• Not using a bucket filled with water to rinse feet before entering.