Best salt to use?

[krschulz]

What are some of you using for salt? It seems I can never get the same kind twice and am getting conflicting opinions of which are good and bad. I notice that my Ca, Mg, K and Hardness all change depending on the salt I use. I would like to stick to one brand, any advice for a reef tank? Is this just the "fun" of reefing, ie balancing things?