I found a couple of different plans for a Kalk reactor online via reefcentral and was wondering what would be the most efficent for a low $.  I was just thinking of taking a fairly round 3 to 5 gallon rubbermaid running it inline with my RO unit and then having it dosed via an auto top off and using a maxi jet to circulate the water at the bottom.  This way adding kalk would be a breeze and I would never have to lug water/ also it would be very cheap.  Any body have any ideas on a good homemade design> 

Brad

Anybody know where to locally get pickeling lime for kalk?