Thanks for responding. I did fill out the pool chart and saw it on the chart results.
I only have the test strips not a drops-based kit. According to my strips:
pH 7.2
Free Cl 0
Alk 80
CYA 30-50
I do have heater, but have not actually heated pool, due to the fact that I have had free chlorine readings of 0 and afraid of an algae bloom.

I added on 6/22 2lbs of ascorbic acid and 1 liter of Metal Free 1 hr later, and I removed my trichlor from the skimmer. I then let my pump run (I had on filter not circulate) for 24 hrs. After the 24 hrs I ran my aquabot robotic cleaner, backwashed the filter, and put in 2 trichlor tabs in the skimmer. PH and all has remained as seen above. I never saw a drop in ph or alkalinity after the ascorbic acid. I stopped running pump 24/7 and went back to 12 hrs on/off. The stain was gone and pool was crystal clear. Then on sunday, it was milky cloudy. Still had no reading on free chlorine, so I added another puck for total of 3 3" pucks in skimmer. Monday was even cloudier and added another puck for total of 4 and 4 oz of proteam severest algae treatment. Now it is wednesday and still cloudy and no free chlorine (despite 4 pucks in skimmer) and now I am noticing the stain returning right under the water line.
I have hired a professional to try and help me with all this (have maintained on my own with no problems past 4 summers). But as mentioned earlier, no one here has any clue as to what is going on! He changed the sand in my filter thinking the sand was holding the organic which was causing stain. But that does not seemed to have helped.
Thanks for your help! I have spent $$ in chemicals to no avail and I am ready to close my pool!!!