I've used IO for the better part of 18 years now and ocasionally try the "new salt on the block" and allways wind up back at the IO I don't notice any difference performance wise, I believe proper maintenance is more important than the brand of salt you use, even the most expensive salt is not all that effective if you only do a water change once a year. I am in the process of upgrading again and will use IO on the new one as well.
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