I didn't add CalMag when supplementing the tap with RO since I thought it would have sufficient levels in my tap water to supply them both. Now I have to head to the hydro shop and need to pick up something for the K def as well as CalMag (see PC, I'm finally bowing down to the Hound!).

What product did you use to clear up the K def? (I have symptoms of both MG and K issues) The store opens in 10 minutes so if you can let me know soon it will help me out...