How many chlorine pills do we put in a 16 by 42 pool. It is 6,100 gallons of water.
It depends on the type of chlorine and the concentration of the chemical along with the gallons in the pool. Consult the packaging as the dosage should be listed there. It will also depend on the bather load, rain, etc. that introduces contaminants to the pool. The best thing would be to test the water 2 -3 times a week and add chlorine as necessary to make sure you have 1 to 3 ppm of chlorine present.