Well I tell ya this subject can definately provoke some heated discussion. Personally I will never use Instant Ocean again as I was one of the victims of the bad batch of salt from a few years ago and lost my entire tank and was so discouraged I just about quit.
Today I use Tropic Marin Pro on most of my tanks and Seachem reef salt on another. I am happy with both salts - both mix well, have consistent readings from batch to batch and bucket to bucket.
For a while I was using Formula salt and if I could still find a realiable supply of this salt I would still be using it.
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