Originally Posted by SnakeBlitz33
I have used instant ocean, tropic marin, tropic marin pro, seachem, reef crystals, Kent Sea Salt, and I am currently using seachem.
If you switch from Instant Ocean Reef Crystals to kent sea salt or seachem, you will kill everything in the tank, at least in my experience. Certain salts don't mix well with each other.
This is true, you would need to switch from a natural to a natural or a synthetic to a synthetic, but you can't go from natural to synthetic, or visa versa.