John Here's what I found out
http://www.aquaculture-supply.com/partb.pdf
Copper is listed as being present in Florida Aqua-Farms Micro Algae grow and is not listed in the WSDA site for Miracle Grow.
http://agr.wa.gov/PestFert/Fertilize...iewTable<r=M
I know you might say arsenic
but look at what metals are listed for Micro AG. I'ts probably not the same stuff.
Anyway I have awhile before the culture is ready to research and decide.
Doug I buy Reef Crew product from Big Al's and don't doubt that they are a great products, but convenient. If I can go to the hardware store and buy fert and then to my fridge for Reef Prime, that's convenient.
I'll give it a try and keep you posted
Keith