I used IO for a long time. price was killing me. So been using RC's for 2 years and it works great and cheaper. started with 10 gallon waterchanges every week for about a month, now i do 35 gallon changes every 2 -3 weeks
Dear hobbyist, IMO , IO is a very good sea salt , yes there are others,but I've been in this hobby for 18 years now,and I've noticed that IO hasn't changed over the years .. Its so easy to use ,and when used with RO/DI water ,IO achieves high standards for your aquarium inhabitants .......
RC has had some bad batches out there, there are a number of threads on it, it has had lower Mg and Ca then it is suppose to have, equal to IO's levels.
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