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.
In the Swimâs calcium hardness increaser contains calcium chloride and comes in granular form which is fast acting and easy to use. When your pool test strip shows you poolâs hardness level has dropped below 150 ppm, simply add about six pounds per 10,000 gallons of water to raise the level by about 50 ppm. Calcium increaser for pools prevents corrosive water from damaging pool surfaces, pool equipment and other areas around the pool.