This stuff is the best
I know this is an old thread but if anyone comes across it, I have used this for years and it is way better than purple up. I contains all trace elements. my corals and coralline love it as well as crabs. My crabs and shrimp consistently grow and molt shortly after dosing with this. I don't use it often, maybe a small dose once a month but its the best. One of only two additives I use.
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