I dose it to my main coral system.
Hooked on the stuff everytime I try to get off it I notice dulling of certain corals blue acro, pink poccy's, purple / pinks in hammer corals. Don't use it or you can be addicted, its very hard to stop I am trembling now just thinking about stopping. :p
I only use at half the recommended rate, greens dulled at the full dose.
Not sure what's actually in it ?? possibly just Potassium, Iron, etc but it seems very potent for the volume added.
I don't dose anything else elemental other than two part plus potassium iodide.
Pete