From what I understand, Dr. Ron did a study of 4 of these salt mixes (IO included) and found Crystal Sea Marinemix Bioassay (which I think is the same as Marine Enterprises Crystal Sea Marinemix)
to be the "best" (ie. lowest in heavy metal content, closest to NSW
) and found IO to be the worst. So much worse he is discarding abuot 150 gallons worth of IO in preference to Crystal Sea Marinemix Bioassay. Our local reef club is bulk buyng 50 case lots (150 gallon worth each) and selling to members for $22 each. WAY cheaper than I can get IO at the LFS
! I think I spent over $50 for an equivilent aount of IO of which I have about 120 gallons worth left. My Instant Ocean salt is for sale cheap, any takers?