I've used AF probiotic salt before and in my opinion its a good salt. I've always had periodic outbreaks of this and that but can't attribute that necessarily to the salt from AF. At one stage, my nitrates were 50 and my phosphate was 1.0 with sps frags in the tank. So probably nutrient related problems causing the outbreaks.
I think the price point of AF products are great and to me, the fact that i can mix up their salt in 15 minutes it's crystal clear and ready to use with no junk left behind is worth using it.
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