Balance. Your water NEEDS PH in between 7.2ph and 7.8ph so it will not damage your equipment (anything metal that your water will touch, such as rails, ladders, heat exchanger in heater, copper piping, etc. ALSO - it helps in allowing OTHER chemicals to perform.
Just remember - your water will do 3 things: if it has too much of anything, it will leave deposits everywhere. If it doesn't have proper PH, it will destroy metals to try to "grab" it from there. Thirdly? If its perfectly balanced, it will not leave scaling and calcium deposits, and it will not eat away at your plaster or metal equipment to feed itself minerals.
Muriatic Acid is used.
Clorine acid and amonia base
Reduces alkalinity of swimming pool water (softens hard water)
The purpose of a swimming pool heat pump is to rise the temperature of the water. The pool then can be used for swimming even on days when the weather is not perfect. The swimming pool season is extended.
Sodium Bisulphate is dry acid for swimming pool use.
It lowers PH
Turn the pool upside-down and knock on the bottom.
rain and acid wash
Most likely not.
Muriatic Acid
nothin
Muriatic acid
Usually you would add muriatic acid to adjust the pools acid level.
You have to know what you are doing. The addition of muriatic acid lowers the pH and total alkalinity in swimming pools.