Which Magnesium do you recommend. I have been using Kent Tech M for a while now because people say it has a undisclosed ingredient that Byropsis does not like. Whether this is true is debatable since i have heard that they changed their recipe at one time which removed this ingredient. I have had Byropsis so this is why I was using it although not anymore. Not sure if the elevated Tech M levels removed it or it was just bad husbandry. Anyway my system is mostly a mixed reef of 500 gallons so I need something economical but does the job.