Kent used to be made by IO, basically it was IO with a secret package mixed in while in the big mixing drums. If I'm not mistaken Kent is now made by Oceanic, not sure how much the chemistry changed but I would imagine it did change somewhat. I still like IO but I did use Kent to set up my 20 gallon tank that I've got everything in until the 60 is ready to go. I've got a bag of Kent salt for the 60 once it's ready but then I've got my bucket of IO for after that.
Frankly, I think all salts have the potential to be good, we all tend to like what we like regardless of what different reports tell us about urchin larvae survival rates etc... I like what I like and as sad as it is, there is no scientific evidence to tell me why I like it, the evidence tells me it's not a bad salt at all so that's great. If the evidence told me it was the worst salt, would I change salts? I can't say I would, if it's been working for me why change a good thing.
Doug
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