I’m getting ready to start making my on saltwater and was curious how everyone chose theirs. My LFS uses Reef Crystals, but for whatever reason, my numbers for alk are about 4.5 and mag is insanely high. I use Hanna for alk and salifert for mag. I used to use Tropic Marin Pro years ago before I got out of the hobby, but didn’t have very many corals. I don’t have a lot of corals currently but looking to be LPS dominate with some SPS and some softies. How do you chose the numbers you want?