Another "Which Kit?"

[waterbear]

for a DPD kit the Taylor K-2005 is pretty much the standard but as Aylad said, an FAS-DPD kit is better such as the Taylor K-2006. I have never been a fan of the Pentair kits. Lamotte makes a decent drop based DPD kit but it costs more than the Taylor and is not any better, IMHO.