Just joined up this week. New to pools. Never had one growing up. We bought our house last summer and it has a 27 ft diameter above ground pool. It's approximately 15 years old and the liner is original based on information provided by the previous owner. Equipped with a ~2010 Jacuzzi Laser 190 sand filter and brand new pentair 1HP pump.
With all the housework, we didn't open it last summer so this is our first year with it. The previous owner had not opened it in the last two years he lived there. So this thing has been sitting idle for about 3 years total.
We took the winter cover off the last week of May. Netted out a few hundred pounds of leaves and other debris, which resulted in pool water that was deep dark brown. We began taking periodic trips to the local pool for advise and chemicals. That treatment turned the water to a light cloudy green but never progressed from there.
After a couple weeks of tinkering, replacing sand as recommended by pool store, etc. and a fit of frustration, I decided to siphon the nasty water out of the pool, bought a K2006 test kit and logged on to TFP. Refilled the pool (the water was as green as grass) and began using the SLAM method and following the "Turning your green swamp into a sparkling Oasis" post as my bible. I'm happy to say that after only a few days, my pool is a cloudy blue. I made a couple mistakes along the way, ie. not lowering the pH before SLAMing and waiting too long to realize my CYA was only 15. But I finally feel good that I've got clear direction on how to get this sucker clear. Just hope my filter is up for the task of clearing the cloudines...remains to be seen. In any event, Sincerest Thanks to all the experts on here. My sanity is preserved.