Reef Tank Magnesium Levels

Will these porducts do the same job for my Reef Tank?

I want to start to grow some coralline algae but I also want to get some corals so i need other levels than just calcium to be high, but this product Kent Marine Purple Tech will raise not only calcium levels but also magnesium, strontium, trace minerals and carbonates. Which according to the Kent Marine Reef Starter kit for corals raises the same exact things but calcium. Will the Kent Purple Tech do the same job as the Kent Reef Starter and help me start to raise corals, or the other way around with the Reef Starter kit helping out the growth of coralline algae? Or should I just not use those and try to do this things with out additives? Thanks alot!!!

Most salts will provide you with all you need if you do your water changes at the necessary frequency. Additives are generally not necessary.

Coraline algae will happen on it’s own. You shouldn’t need a thing to promote it but time.

However, if you are doing additives, the advice I always see is
“Never add anything you are not testing for”.
Know how much is the correct amount, and test your levels.
Too much is as bad, or worse than, not enough.

How to Raise Magnesium Levels in Aquariums – Bulk Reef Supply