Quote:
Originally Posted by daniella3d
Interesting. I never ever had any deposite with IO or Reef Crystal but always have had a brown deposite, sort of shiny, with H2O and I tried 3 buckets with the same result. After writing to DD they said it was due to ferric oxide they add...not exactly pure salt mix huh?
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Hmm, haven't had that. However, ferric oxide is simply GFO minus the G. Ferric oxide is a fancy way to say rust. Not a big deal...however I'm not sure having the GFO mixed in the salt is really a good thing.