purple up enough for calcium?

[Oscar]

Originally Posted by Myka

Personally, I don't know everything that is in Purple Up (they don't list it, it's a secret), so I would not trust it to be the only calcium source. I also don't believe Purple Up does anything for coralline growth IMHO.

OK so what is the supposed benefit of Purple Up? I have been using it since I started my tank 2 months ago, primarily to encourage coraline alagae. I am using Kent salt and my clacium is regularly testing at 500 although my Mg is low.

Is there any benefit to Purple Up at that level of calcium? It tests at that same level with a fresh batch of SW as it prepares for a water change.