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I have always been a Tropic Marin user, and had good results.
Now I am setting up my new big system, finally, and I was thinking: Should I change to Instant Ocean, due to being able to get it more easily (say, in an emergency) at PetSmart etc.?
Does everybody use IO?
There have been endless discussions on salt, expert articles and even in depth chemical analysis...and yet, people seem loyal to their own brand. I have also read about people switching salt and their tanks crashing...or thriving...incidentaly with the same brand of salt.
That tells me that it probably doesnt matter a whole lot.
We've always used Reef Crystals. The alk seems a bit high and the PH a bit low. We're going to be switching over to Tropic Marin. I'll let you know how it goes.
I use Oceanic and love it. I started out with Reef Crystals and had alk issues with it. Since I switched and did some fine tuning, everything has been A-OK!.