While spaying is traditionally recommended for kitties between 4 and 6 months of age, spaying as young as 8 weeks old is considered safe, according to Cat Channel.
The national drinking water standards state that the maximum residual amount of chlorine is 4 mg/L. Untill recently the USA used chlorine gas extensively for wastewater treatment. Today, the use of chlorine has been forced back.
Once you have calculated the gallons in your pool, you can begin depositing the recommended amount of chlorine into it daily or weekly. According to the Pool and Spa website, you add 2.5 ounces of the chlorine for every 10,000 gallons of water.