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.
Calcium Hypochlorite. This is the most popular chlorine pool shock. It contains about 65% available chlorine and is cheaper than the rest. When adding to the water, you must first pre-dissolve each pound in a 5 gallon bucket of water to prevent bleaching. This type of shock is slow dissolving, so it will not completely dissolve before it hits the bottom of the your pool. Once added, you will need to wait 8 hours before swimming. 65% chlorine.