| SaltyQueen-
The only thing I've read is IO had a bad batch that caused some issues with people's tanks. If you go to a couple other forums, you can find a rather lengthy threads on this issue. There are many IO users that do not have any problems at all from IO. This is a debate that may be best on another thread. If you aren't having any problems, then I wouldn't worry about it.
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~Nikki~
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