Knob Vs Korallin

[rkehockey16]

What is the better reactor Knob or Korallin, or are there any better ones out there. i have a 125 tank not ready for coral yet but i figure it is never to soon to start shopping around.

 

[lunar]

I run Ati 2 reactor filled Korallith media, but this brand has made the newer version of it with sloping lid. Alk in my tank is 9-10 dkh and Ca 420 ppm (Salifert test). Since I have SPS tank I use also kalkwasser reactor.