I am really interested in trying Coral Vitalizer, how did peoples SPS react to this additive?
I don't run full Zeo. Other than the weekly addition of traces, a drop of ZEObac to keep the bacteria population divers, I only dose Coral Vitalizer. One drop a day of CV into a system with a total volume of 40-45g. So a bit more than half the dose KZ recommends. And I keep Alk between 7.25 and 8.
My SPS are lovely. NOT the pale colors typical of Zeo tanks. But really deeply colored. In fact, I've never seen a tank in person that has better colored SPS. Not even close. But I know they are there - I hear about it, and I see the pictures here. So I guess that's my way of saying, I think it's pretty well colored up.
Is it the CZ? Or other husbandry? My lights? Hard to say. Things other than CZ matter where color is concerned. The best coral under crap light looks like crap coral. But I think CZ is an important part of the equation. My friends have nice lights. But they don't have the coral coloration I do. So SOMETHING extra is going on in my tank.
I can say that within a few days of starting CZ a couple of corals starting showing additional colors. By that I mean - for example - a blue SPS now turning green in places, making it a two colored coral, where it had been mono-colored. And I THOUGHT color saturation improved everywhere.
Was this real? Or maybe I just looking at my corals more closely now that I was dosing CZ, and had not noticed those colors before. I don't think it was imagined, or only newly noticed. But cannot prove it.
So, does it work? I know I can't prove it, but I believe it does. I believe it enough to keep paying stupid money for those little bottles. And I'm NOT made of money.
Hope that helps.
Oh, one more data point to muck up the works... I talked an SPS friend (with an awesome Radium knockoff lit SPS tank) into trying CV for a month. Did absolutely nothing for him. Though I believe he keeps his Alk around 9.5-11.