That salt video is a joke. I cannot believe that they put their name on it. I just got 4 boxes to my door of IO for $35-36. The prices are ridiculous in it.
I have acropora and clam system. I have to doctor up any salt to meet my needs, and the more that you get into the hobby, you likely will too. Muriatic acid to lower alk and some dowflake (calcium chloride) to raise the calcium. Instant Ocean for me - have tried a few others and always made the way back.
I know that most of you have not been around long, but some of the salts that are punchlines today were once as "hot" as Red Sea and Fritz... those include Oceanic, Kent, Coralife, SeaChem and many others. Tropic Marin and IO have stood the test of time for a reason.