How important is magnesium ?

[finley]

I have pretty good of most parameters, but I don’t have a test kit for magnesium so I was just wondering how important it really is and if not knowing really makes a difference ?

 

[Spare time]

Imporant, but unless you are not doing water changes and are going through a decent amount of alk and calcium, its not a big worry as it drains slowly.

 

[Miami Reef]

I have pretty good of most parameters, but I don’t have a test kit for magnesium so I was just wondering how important it really is and if not knowing really makes a difference ?

Perfect. Don‘t get a test kit for magnesium. Don‘t test for it, either.

Read this: https://www.reef2reef.com/threads/just-say-no-to-magnesium-testing-rmm-is-born.1017528/