WE take our water to the pool store to be tested at least weekly. Every thing seemed to be balanced except the FC level. WE've had significant amounts of rain, and lots of dirt and debris got into the pool. After a few days, we got that mess cleaned up. Now about a week later, our water turned green. No mention of algae by the pool store when the water was tested, but they said the ammonia levels were off the charts. We were instructed to put nothing in the pool and have no chlorine running through the chlorinator Rather, we were to drain and refill. After abour a week of draining/refilling, the water is still green. It seems to me that we need to have some some of chemicals going into the pool b/c the new water is not diluting the existing water. If we were to shock it, they said we would need to add 93 bags of shock (to the tune of about $1k). We are taking it to be tested again today, but I was hopeful that someone could give some guidance as I don't have much confidence in the pool store now.