Pakistan's natural resources range from natural gas reserves, vast land, coal, petroleum, copper, salt and iron ore among others. It has the second largest salt mines in the world, as well as worldâs fifth largest gold mines.
Leslie's 14427 Hardness Plus, 25 lbs. Leslie's 14428 Hardness Plus, 45 lbs. Keep your calcium hardness at proper levels at all times to help protect your pool, water, and pool equipment. The calcium hardness level in a pool does not increase rapidly, but it is good practice to check the calcium hardness every month. Adding 1-1/4 pounds of hardness plus to 10,000 gallons of water will raise the calcium hardness by 10 ppm. **The minimum level of Calcium Hardness is 150 ppm.
How To Raise The pH Level In Your Swimming Pool. Raising The pH Level to 7.4 - 7.8 Using Sodium Carbonate (soda ash) The proper range for a swimming pool is a pH of 7.4 to 7.8. If your water tests low for pH, then first make sure that your reagents or test strips / kit is working properly. They should be replace yearly as over time they do not work accurately.