You need to replace the water that evaporates.
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.
Yes, you can add powder chlorine to a Pebble Tec pool. However, it's important to dissolve the powder in water first before adding it to the pool to prevent any potential damage to the surface. Always follow the manufacturer's instructions for dosage and application. Additionally, be sure to test and balance your pool water afterward to maintain optimal water chemistry.
Reduces alkalinity of swimming pool water (softens hard water)
Yes
Water needs to be tested for, lets say, a pool, because it is important to know what chemicals to add to your pool.
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.
Add acid
That depends on the size of the pool and how fast the water is running that is filling it.
10000 you can always add more to get your levels correct. But high pool chemical levels are hard to get correct
The maximum amount of acid you can add to pool water at one time typically depends on the size of the pool and the type of acid being used. For muriatic acid, it's generally recommended to add no more than 1 quart per 10,000 gallons of water at a time. However, it's crucial to follow the manufacturer's guidelines and to add acid gradually, allowing for proper mixing and pH stabilization before adding more. Always test the water after adjustments to ensure safety and balance.
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.