Here we go.
I have a 45000gal in ground SWG vinyl lined pool.
Followed the BBB methods and have had spectacular water.
Went away for long weekend.
Upon return water level was several inches low.
Refilled with well water(first time using well to fill pool) while kids swam.
Wife came home from work and wanted to go for a dip, said water was green and too cold. Please turn pump and heater on.
I turned the pump on and found the source of my low water. The body of sand filter was cracked and produced a geyser.
Pool store ordered new filter under warranty, be here in a week. Need to shock pool.
Over a period of 4 days I shocked the pool, first up to 24ppm for two days, then up to 36ppm for two days. No change noticed. My pump will recirculate and I have an endless pool so I have good mixing.
Pool store said to use flocking liquid then vacuum to waste. No change noticed. No precipitate to vacuum.
Took water sample to second pool store, tests show no iron or copper, but ph up to 8.4. I added 2.5 gal muriatic acid.
Now waiting to re-test ph.
I surmise that something in the well water has caused my pool water to turn green. Water is clear and colorless to about 3 feet in depth, below 3 feet it gradually turns green, but still clear.
Whatever it is that is coloring my water should not be organic because, my chlorine levels have held very well and there has been little precipitate filtered with my robot.
So, any ideas what this is, and can it be eliminated without the use of my sand filter? Naturally, the new filter will not be online before my sons Marching Band party on Thursday, 8/13/09.
Thanks in advance for your help!
Edited for more natural font size. JasonLion