Can you add softened water to a pool?

Soft water basically is the process of removing calcium and other minerals to "soften" the water or make less "hard". To answer the question NO you should not add soft water to your pool because soft water (under 150 PPM HArdness level) is corrosive and can cause damage to your pool shell and equipment. Soft water also easily foams.

Bob Wormus Simply Certified Commercial Pool/spa Consultants 714-580-2459

We asked our water softener salesman this question and he said you wouldn't want to *fill* a pool with soft water, but to top it off with soft water should be no problem. The water in the pool gets harder and harder as water evaporates and minerals are left behind, so adding a few inches of soft water should not significantly affect the hardnes. Meanwhile, monitor the PH.