Hi everyone..we just bought a house and I have been reading these forums. Lots of info, especially for a first time pool owner like myself. So, long story short we closed on the house a week ago. The previous owners had the pool opened and cleaned. It looked amazing for the first few days. Being new I stopped at the fancy pool store close by with a water sample. The ran it and said everything looked great except the pH was a little low. They gave me 25 pounds of of sodium something to add to skimmer slowly and said to add 2 packets of shock. I did as instructed and the next day the steps and most of the liner were stained a yellowish brown color. I saw on here that I should rub liner with a vitamin C tablet which I did and it immediately came off. I have a pool guy coming by tomorrow to teach me how to use the equipment. He said he was bringing "pool magnet" to fix the staining.
The pool is a 18 x 36 Grecian with vinyl liner and 25000 gallons of water. Does this sound like a proper solution? I have read that the stain removing has to be done when chlorine levels are near zero. Any other ideas to get the pool back to normal? Strange thing was that the water sample I took to them showed 0 iron. I don't see how thats possible when I believe thats the cause of the staining. Has anyone had luck having a pool supply store fix their mistakes when they recommend something and it results in a stained pool?