I’ve been using this salt since shortly after starting this thread. It’s been great for me, mixes well, my alkalinity stays solid (I do use kalk) but for the price I dig it. I think I’m on my 3rd or 4th Box already.
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I have been using in for awhile with pretty good results, mixed up a batch and tested mag and it was 1500+ using salifert kit. I don't know if storing it for weekly water changes is making it rise but seems kinda high.