red seas calcium +3

[reefnut]

is this stuff any good.after buying a salifert ca test i found that my ca was at 330 ppm.i tried the calcium +3.i added a half dose waited one day and tested no raise in ca.So i tried another dose and still no more calcium.also my pulsing xenia shrivelled up for about 4 hours after each dose.thought it might just be coincident the first time.any useres of this product tell me how it works for you.thanks