Save your money. Just get your Alk & Cal up to levels and you'll start to get coralline. Better yet try and get some scrapping and put that into the tank too.
Keep parameters on point ...I tried it a few times with no luck then learned how to care for my tank the MR way now I have so much ......B-Ionic 2 part is all I use along with some Stronium once or twice a week...