I'm on year 5 with my AGP. I never had to vacuum it for each use. Every day it seems the bottom of the pool has green. Some it is actually staining. I don't believe it to be algae and am performing a FC test tonight. I know my chlorine has dropped at times, due to sunlight and heat and I will monitor that better.
But what looks like dirt, possibly pollen, collect in any creases of the liner, etc. When I brush it, it just cloud puffs away. I use a skimmer sock in my setup and it's always green.
I have wedding cake steps. This year, I drill a couple 2" holes to allow better circulation, in hopes of keeping underneath them cleaner than last year. Last year, when I closed the pool, they were dirty, but not horrible. This year, after only a month of being open, underneath those steps is twice as bad as the entire summer was last year. I'm going to pull them and clean them. I'm thinking of making the holes big enough that I can sneak a vacuum hose in there, while they are in place. I guess it's possible debris cycles from in there, but honestly, I see the green debris mostly on one side of the pool, and the edges (where it might get washed off of my blanket and into the pool).
Any thoughts would be appreciated.