Calculator use
The answers you get are estimates for home pools. Check each product's label, and if it says something different, do what the label says. Test the water both before and after you add anything.
Safety
Mixed together, pool chemicals can burn, release gas or catch fire. Keep them away from children, store them apart, and add one at a time.
No warranty
The site comes as is. To the full extent allowed by law, Riverbend Systems LLC has no liability for losses from use of the site.
About the site owner
Riverbend Systems LLC, 1200 Brickell Avenue, Suite 1950, Miami, FL 33131, United States. Florida law is what applies.