I had my in-ground pool (20' x 40') closed last winter by a different company than the one I used before. They put a few gallons of anti-freeze into the return pipes after blew the water out (while the previous company didn't add the anti-freeze). When I open the pool this year, I added Algaecide, Total Alkaline, Shock, PH+, etc in the first week at different time. Whatever I put in the pool will cause large amount of foam (and it's gone after a few hours). Another thing different was that I didn't see hundreds of worms in my pool this year. Yes, I got them in previous openings.
My pool used to get clear in 3~4 days. Now, it's been a week, it merely turns light green. I put total of 3 gallons of algaecide, 25 lbs of shock in my pool already.
Can somebody explain the worms and foam thing? Could be there a crack in the return pipe that cause the foam and also allowed the forms to flee?
Thanks,
-H