Lower ph:
If ph is 7.6-7.9 add 8 oz per 10,000 gallons of water..
If pH is 8.0-8.4 add 16 oz per 10,000 gallons of water.
If pH is above 8.4 add 24 oz per 10,000 gallons of water.
Lower Alkalinity:
2 lb per 10,000 gallons of water to lower alkalinity by 10 ppm.