There was a woman in the local highend ritzy poolstore, I was in getting some feherguard clips for my reel, this woman had a shopping cart full of stuff, I asked her why she had all this stuff (I think it was hundreds of $ worth), she showed me her water sample printout and their recommendations.
I told her to put the stuff back, go to walmart and get the 3 B's as well, I pointed her to this forum, don't know if she ever signed up here, but she left without dropping a cent - and i don't feel bad about it!
I've stopped many from making that recommended purchase, converted about 20 people at work to the 3b's, and almost all my neighbours, so the moral is that together we can stop the poolstore madness!!!