How one can order IO in 200-gallon mix sized box? What is the price?
I have not seen it in stores

It's pretty cheap apparently, 39.95 (compared to $15 I spent for a 25 gal box)
for 200 gal. I'm sure shipping is a bear, but still cheaper in the long run.
http://www.premiumaquatics.com/Merch...=CTGY&Store_Co
de=PA&Category_Code=Salt

found via froogle.com:
http://froogle.google.com/froogle?q=...ocean+200+salt
~John