I prefer H2Ocean for my reef tanks, but I prefer IO for my fish only tanks. By your post I'm assuming you are asking which is the preferred salt for reef tanks, so I voted for H2Ocean.
I like H2Ocean for reef tanks because I only have to add magnesium and potassium, plus I prefer the lower (than IO) alkalinity so I can keep the alkalinity below 8 dKH in my reefs. It also mixes up much cleaner than IO which leaves a brown residue on the sides of the mixing barrel.
I like IO for fish only tanks because of the higher alkalinity and the cost.
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~ Mindy
SPS fanatic.
Last edited by Myka; 09-19-2012 at 02:07 AM.
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