Originally Posted by barbarossa4122
I heard to versions, 1.7 or 1.5. Does anyone knows for sure? Btw, I am using Metricide and I don't blame Seachem for sticking with their product which is good but, pricey.
Not that I am aware. Seachem won't even admit what is in their product, so it is hard to say. I am tempted to send it to a mass spec lab, as I already have products going for testing.