slimy, gelatinous strings of goo ruin a good dip.........

[aylad]

If you're getting algae on the bottom, then you need to shock the pool up to 12-15 ppm with bleach and hold it there until the algae dies. (you can test with the 10 mL sample instead of the 25 mL sample, and your reagents will last longer--for each drop you add, you'll multiply by 0.5 instead of 0.2, but that's close enough. I don't trust your CYA reading--did you use the disappearing black dot test? If so, you're not really going to be able to register CYA levels less than 30 ppm. Your other numbers don't look bad, though.