I had my new pool filled on May 5 of this year. Since then we have grey stains on the white plaster. The pool company is saying it is a hydration problem and they will have to drain the pool, is this right? Also, now we are getting brown rough spots, which they are calling scales but can't tell me why it is happening. The chemicals are never right. Since May I have added 3 bags of salt which seems excessive. The chlorine is always low or none. The pH is always high and I need to add acid. I have added stabilizer once already in July and now they are saying I need more. I talk to people with salt water pools and they haven't done any of this. Any assistance is appreciated because I am constantly arguing with the company that put it in. Another thing is the guy first told me you need to run the pump at least 6 hours a day to produce chlorine, then he upped it to 8, now he wants me to run it 12 hours. This just doesn't make sense. Could the salt cell be bad even if I am not getting a reading on the meter? For some reason the salt and chlorine are not staying in the pool and the plaster looks terrible and they have no answers. Help!! Pool is 10,000 gallons.