How much salt per gal of water for swimming pool?

If you have purchased Saline System equipment, you add regular 'salt' to the pool water. The salt (sodium chloride) is pure evaporated ocean salt - the same as you would use at the dinner table. Use 'rock' salt, but make sure it is sodium chloride and not potassium chloride (which is sold for some types of water softeners). Minimum salinty varies with the brand of saline system equipment, but is usually in the 3000-4000ppm range. 3000ppm is the same as 0.3%, by weight. Multply gallons x 8.33 to get weight of water in pounds, then x 0.003 to get pounds of salt.