I can see why someone would suggest that Red Sea Coral Pro and H2Ocean were the same, they have the same bucket, tie strap, bag etc. So, for sure they use the same packaging supplier.
I find that Alk is higher in H2Ocean than in Red Sea Coral Pro (I was using Red Sea Coral Pro until December, then I switched) but calcium is lower in the H2Ocean and I've had to start dosing it on a regular basis. I used to dose alk the day after a water change, now I've got a few days grace before it starts to get into the 'dose now' range.
I've got a 10 gallon Zoa/softy/LPS tank w/no skimmer, so I tend to notice the differences in the water pretty quick due to the frequent water changes.
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