Sounds like you are the right track. Here are a couple of thoughts.


1. Add 1/2 quart of Polyquat 60 algaecide if you think you still have algae growing. The stuff costs about $20 per quart, but it is great at killing algae. Once you add that stuff the algae will be dead.

2. You may have bacteria consuming your chlorine - likely not - but keep adding chlorine bleach at night to achieve 10 ppm for a few nights in a row. I'd guess a full 1.5 gal jug would be enough with a 14,000 gallon pool.

3. MOST IMPORTANTLY. Let your pump run 24 hours per day till this clears up. Change your filter (DE, sand, etc. not sure what you have). You have probably killed the algae but now you have dead algae floating around the pool. In my experience it may take you a week for this to clear up. You will have to change your filter again at the end of the process. To speed up the process, you may want to add some liquid floculent (a polymer chemical that makes particles cling together). Liquid floc is available at Lowes or Home Depot. This is not necessary, but will speed up the process somewhat. If you buy some, get the most plain jane product. Nothing fancy.

4. Sounds like your numbers were pretty good when you started. The pool store was just monkeying with your water for the hell of it. I used to have problems with algae blooms about twice per year. I discovered that I was not religiously adding enough bleach. I now add my bleach every evening at sunset. Since I have religiously added my bleach every day, my water has been beautiful sparkling clear and I have not had even a hint of algae. Make sure you add your bleach at night since the sun burns it out.