Split off of this topic. JasonLion
I have the same problem and came across this forum out of frustration with my local pool shop. I have continued to dump $ buying Algacide(chlor. & cooper based), Ultra Super Shock, & Phos free with no improvement It's still there and my chlorine level is still 0. I did notice that in my skimmer there is a substance floating on top of the water(?) and a oily residue (darkish color) at the water line in skimmer, any ideas? Hear lots of talk about pollen, does pollen effect Chlorine levels?