I felt like I had won the lottery when I found you people last week. Here is a brief synopsis of our problem:
20,000 gal fiberglass, cartridge filter with new cartridge. Water was cloudy and pool store had us adding muriatic acid by the gallon (>250, no printout) Then the green tint. Treated with very expensive algaecide and floc and nothing. Now very green. New pool store and less expensive algaecide and clarifier and after vacuuming to waste, no green, but back to cloudy. Lost faith in pool store and found YOU! Used 5, 1.4? gallons of clorox on Saturday and left the pump running. Water looks great now, but a beautiful color of blue it's never had. What does that mean? Back to pool store #1 yesterday, told them what I did and received a cool reception. They did run the water for me:
FC 7.8
TC >10
CC 2.2
pH 7.6
Hardness120
Alkalinity w/stabilizer correction 82
Cyanuric Acid 95
Now they want me increase my alkalinity (after all those gallons of muriatic acid) and increase hardness with Ca hardness increaser.

What do you wise people suggest I do? I haven't been a very quick study for the pool chemistry thing. But I'm reading old threads and learning slowly. Thanks for all the wisdom out there.