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.
-E
Add salt
Remove some water in container (10-20%) and add new water. example: pump water high in cyanuric acid out of a swimming pool and the add fresh water to the pool.
Work out what size pool you have how much salt is required and purchase the right size system to suit your needs.
Reduces alkalinity of swimming pool water (softens hard water)
You need to replace the water that evaporates.
Yes
Water needs to be tested for, lets say, a pool, because it is important to know what chemicals to add to your pool.
My suggestion would be to dilute the water by draining 1/2 of it & refilling it with the wonderful spring water that you have. :O
Add acid
Yes, you are supposed to add it while there is water in the pool. Add with filter running near a return line. Add it slowly and if possible, brush the pool to help mix the acid. You can swim within 30-60 minutes.
That depends on the size of the pool and how fast the water is running that is filling it.
You should add shock to your pool when the water needs a boost in sanitizing power, typically after heavy use or if the water appears cloudy or has a strong chlorine smell.