Carl, I love option 2. I must have missed that one. It sounds like a great option for everyone opening up the pool for the season and finding nasty green stuff.

To many liners are ruined by draining, cleaning and trying to refill. Liners shrink when emptied.

Any chance you or Poconos could tell us more about this method. Why the plastic? How does the fresh water stay seperated from the green stuff? How long should this take? Do you siphon or pump from the bottom?

Such a great concept, I need to know more.