Not knowing anything about pools - and traveling 3 out of 4 months - got me in a bind.
We bought a house with a pool and happily let the TC pucks float in the floaty, but not long ago a lot of the dirt after a sand storm didn't want to be vacuumed. Then we found that brushing didn't do anything for it either and it kept growing.
Started in the curves on the shady side, but spread all over.
I thought it was iron, but Vitamin-C didn't touch it and the Tc puck made it disappear.
I needed to do a partial drain anyway because my CYA levels were way off the charts - 3.5ml pool water and 3.5ml of the CYA reagent cut with 7ml of distilled water got me to a CYA reading of 60. My limited math skills tell me that my CYA is approximately a whole bunch.
So... Where we are now:
I drained 3/4 of the water from the pool and added a couple of gallons of 6% chlorine bleach to what was left, then we washed the walls with a strong bleach solution. Walls look real good now - though the paint is kinda' uneven in spots - but the stains on the floor weren't budging.
I tested and came up with 30ppm FC and added another gallon of bleach. That's about when the water started turning cloudy.
At this point the water - about 2' deep - looks like skimmed milk. When I hit the floor with a brush I get rolling clouds of white broiling in front of the brush. The stains seem to have faded some, but the worst ones, the ones at the curve between wall and floor on the shady side, are still very prominent. I can't tell what the stains down by the drain are doing 'cause I can only see through about 6" of this stuff.
Any ideas, guidance, suggestions...?
It's been soaking like this for about 4 hours in 110 degree full sun.
Appreciate any help.