How do you get rid of brown stains on the bottom and walls of a pool liner that may have been caused by adding baking soda to increase the PH?

Answer 1

Baking soda actually raises the total alkalinity of your pool. This does also increase your pH, but should only be used if your test kit shows low alkalinity. Otherwise you'll raise both pH and alkalinity and then have to use alkalinity down. Borax will raise PH and not alkalinity, but it raises it a lot. Start slowly by adding 1/2 box per 10,000 gal of water. Check the pH after 24 hours to see if you need more. Be sure to use only Borax and not detergent with Borax.

Answer by TS( It must not contain detergent ) Only use 20 Mule Team Borax Laundry Booster. It can be found at any grocery store. Try using the same amount as you would with PH plus 1 lb. to 10,000 gallons, and wait 2 to 4 hrs. Then check your PH reading. If it's still low, add some more until you get it to 7.2 to 7.8 range. Caution - check your alkalinity before using borax, because borax raises PH only, without affecting your alkalinity. If your alkalinity is also low you can use baking soda to raise your alkalinity and PH. Baking Soda raises PH and Alkalinity at the same time. Baking Soda has the same ingredients as Alkalinity plus, but half the price. Take a look at this web site for more information on Borax. http://www.poolsolutions.com/gd/borax_20mule.html(copy & paste to use link)

Answer 2

Try increasing the acidity of the pool for a while.