What Kalk mix do you use?

[ScottK]

I got a gift certificate to Marine Depot for christmas, and was going use part of it to get some more kalk mix for my reactor. I've been using Kent's for a while, but I noticed that there are some other brands, some of which cost over twice as much as kent's. Is there any reason to pay the extra for it? I've had good results with the Kent, but is there a better brand I could be using?

 

[alrha]

i use seachem's Kalk (i happen to trust their products).
different kalk mixes could contain more impurities than others, so there can be a difference in quality (like with everything else)