Softening Pool Water
Once you’ve determined that your pool water needs to be softened, it’s time to take action.
The first option to make your pool water softer is to drain some water and add some new, fresh water. Start by turning off your pool. Then drain just a few inches of water from your pool with a pump.
If you have access to a fresh (not hard) water source, use that to replace the drained water. Otherwise, you can use the garden hose, assuming it is softer than the water in the pool.
Once the water levels are back to normal, turn the pool pump back on and let the water circulate for 8-12 hours before testing the hardness once again.
If replacing some water doesn’t work well, you can try using a chemical water softener.
Once you purchase a pool softener agent, fill a five-gallon bucket with water from your pool to about half its capacity (about half full). Then, add the chemical softener to the bucket according to the size of your pool and the instructions given by the manufacturer of the softener. Mix the water and softener solution, and pour the bucket back into the pool, and turn the pump back on.
Re-test the hardness level of your pool after about 24 hours to check if your pool is now in the appropriate range, or if it needs more softening.