To raise calcium in your pool use calcium chloride. You premix it in a container to let it dissolve and add 6lb for 10pmm in a 50,000g pool.
Calcium can't be removed it can only be lowered by replacing the water.
Baking soda will not soften (remove calcium hardness) from pool water. It will raise total alkalinity.
Baking soda does not contain any calcium. It can raise the pH of pools but it can not raise the level of calcium.
Any time you like calcium is harmless
If the calcium is a result of pool chemicals, draining some or all of the pool water will lower the calcium hardness level. If the cause is the fill water, commercial hardness reducers or chelating agents will bond with the calcium to keep it trapped in solution.
Low Calcium Hardness in pool water means that there is low calcium in the water and is considered "soft" and soft water tends to be corrosive. It will etch away and your plaster and any metal object the pool water touches.
Because you're a doucher with a pool.
Use lots of calcium
Go to the pool dealer and purchase a calcium hardness test kit.
The best way to lower calcium hardness in the pool water is to drain the water and refill with water of lower calcium hardness. Have the calcium hardness tested for both the pool water and fill water. Ideal range is 175-300ppm. There are 'calcium reducer' products available through pool stores, but not sure how effective or economical they are.
Turn the pool upside-down and knock on the bottom.
You whip your dick out and pee in the pool.. that oughta do it! :)
nopee, you cannot.