I told the wife to CAN IT. There are bigger fish to fry around the house than a pretty color pool.

But it's that bad to get a dark pool? I suppose that is why the light blue is so popular. We took a hot air baloon ride several years ago, and went over Rancho Santa Fe ($2-20M homes) and saw several dark blue pools. But not close enuf to see any discoloration. What's that phrase, "once you go dark you don't go back?"

Thanks for the tip though. What causes the discoloration? Chemicals, I would guess.