How to Add Copper Sulfate to Pools | Hunker
This is the amount of copper sulfate you should add to your pool, based on the pool''s total alkalinity. Do not add any copper sulfate to your pool if your alkalinity is below 50 ppm or above 200 ppm. If it falls somewhere in the middle of that range, use between 2 and 6 lbs. of copper sulfate, depending on the size of your swimming pool.