I've not used Reef Essentials. There are multiple products out there that increase Mag. I would follow the instruction on the bottle or just wait until your 2 part kit comes and go from there. Hard to say without having used the product before. I'm happy to offer advice on products I've used, but always hesitant to comment on those that I haven't. Perhaps someone with direct experience with this product can chime in. When is your 2 part stuff arriving? You may be okay until then.
