Had to get chlorine it's cheapest at the pool store (10L (bulk)12% for $5) and this women was in front of me. I heard the women at the desk saying - to stop the algae you need to put this bottle of phosfree in your pool "shock" it with this some chlorine powder thingie in a jar that "super shock" or something like that... and add 2 bottles of some sort of "super algae remover" (not sure on the brand - was to busy laughing) so then I heard the amount. and it was a whole $135!!!! I was liok ***!!!! I dont think i spend that in a year in chlorine (this is year one with BBB) but then realized had I not found this web site that would of been me!!
I gladly gave my $10 for 20L of 12% chlorine and am good for another couple weeks of a shiny clean pool!