Even Chem_Geek loses his head from time to time!

Waterbear is ABSOLUTELY correct: Phosphates can be/should be ignored UNLESS all corrective measures for algae-killing fail. 99 out of 100 pool store guys will sell you a phosphate-remover (expensive) that you don't need, but Evan won't.

I'm a super-minimalist: I don't like adding anything that's not needed. Only Polyquat 60%.