reef crystals VS. kent sea salt
Andrew nailed it. Use Kent or IO. Reef Crystals has been tested a few times against its cheaper cousins and hasn't shown any significant benefits. It is supposed to be higher in Ca and some of the other trace elements but I don't think it is IIRC. I use IO because it did a little better than Kent in that AF article that tested all the major brands. Coralife is the brand that was hammered for, among other things, having enough lithium in it to make a horse very calm.
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