I've gotten fed up with my continuing algae problems (most likely due to well water fill and exacerbated by a pebbletec finish) and am intrigued with the idea of borates. Since my pH tends to to rise anyway, I think boric acid would be the way to go. I've found a decent bulk price of $1.32/lb here: http://www.advance-scientific.com/Prope ... %28BULK%29 for 50lbs. With ground shipping the price is $1.77/lb.
Wondering if others have any better suggestions for suppliers. I'm in CA and would love to find one based out here.