You should add a few granules to some water, and then add this water to your hot tub water a very small amount at a time. See the related link I posted for more information on testing and using the chemicals.
Add chlorine and stabilizer.
you have to aid a conditioner or stabilizer with cynaric acid in it.
Shock first, then check your stabilizer. Add stabilizer as needed.
Stabilizer can effect the pH some but usually it is a very minor amount. You should be able to swim the same day.
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.
No, pool shock is normally a really strong chlorine and stabilizer is like sunscreen for the chlorine
You mix stabilizer powder and water
no
Check if you have any stabilizer in your pool without stabilizes (cyanuric acid) the chlorine use is greatly increased.
Ad cyanuric acid/stabilizer, this is available from your pool shop
Stabilizer is used to protect Chlorine from the UV rays of the sun. If chlorine is not protected from the sun, all the shock you added yesterday will be gone by lunchtime today. A normal stabizer level is around 40ppm (parts per million) if you get above 100 ppm your pool water can lock up and chemicals will become inactive. Also note: if your level becomes too high the only way to lower it is to exchange water in the pool. If you use a stabilized chlorine, it will, over time increase your stabilizer level in the pool. So be careful not to over stabilize. It is better to error on the side of under stabilize the to over stabilize. Stabilizer is also known as Cyanuric Acid
When adding stabilizer to a pool you should not have a backwash valve open. Stabilizer should be added directly into the skimmer basket and you should open the skimmer all the way and close off the main drains for 24 hours.