Hello! We have a fairly new 20x40 in-ground vinyl pool, approximately 30,000 gallons; it was installed/opened last May. We started out using Baquacil. We didn't have any problems with it, but as you all know, it is very expensive. We decided to convert it to chlorine this season. We opened the pool in mid March and our local pool store began the conversion process for us when they opened it so I don't know what that entailed. They had me adding 2 lbs of non-chlorine shock weekly in addition to chlorine pucks in the skimmer for a few weeks. In mid April, they told us to change the sand in the filter and start adding chlorine shock to the pool. When I put the chlorine shock in the pool, the water would turn green. After about 24 hours it would clear up. About two weeks ago, I added the weekly shock and the water turned green and cloudy. After several days it had not cleared up; the pool shop told me to add clarifier to it, so I did. After about 2 days, the water finally cleared, but it wasn't crystal clear like it was before. I took a water sample to the pool shop the day after the water cleared and the chlorine level was low, everything else was balanced, so they told me to add 2 more pounds of shock. At that point I decided to switch to liquid shock because I was having trouble getting the powder shock to completely dissolve. Dumped the two gallons of liquid shock in the pool, it turned green again. It took about a day and a half for it to clear up, but it wasn't crystal clear. Took another water sample, again, chlorine was still low, everything else was good. Added 3 gallons of shock yesterday evening (from what I read, I should use one gallon per 10,000 gallons) and the water is still green this morning. I have backwashed the filter 2-4 times during this process. I am concerned about the water staying green for 1-2 days. Is that normal when you convert from Baquacil to chlorine? How long will it keep doing that? Am I not doing something that I should be? Any assistance would be appreciated.