I also bought a jar off ebay. I haven't used it with any regularity, probably about once a week or so when I remember. I just use it to feed corals and have a feeding syringe I use to administer it. I haven't seen any spectaclar growth but nor have I seen any decline. I can't say it makes me go "ooh-aah" but I do feel better about using it if that counts
Christy
