Thanks again. I'll give the acid a try. From testing this am it took 4 drops to get the color down to the recommended ph. According to the ph chart that means I need a little over a quart so I'll just do a little at a time and retest. As far as the pool size goes the pool builder told me 12,000 gallons but the next time I refill it I'm going to get the water company to do before and after readings to confirm. Are any of the digital water testing devices available to consumers worth buying?