CalMag+ in Coco? Do I need it?

[Weezard]

Hmmm thats a good one.

Well for starters I use RO/DI water (de-ionized) for that extra level of purification. I have a client that I take care of his saltwater aquarium and they use RO/DI units to prepare saltwater.

Maybe I should be adding some CalMag being as my water is so pure?

Well, it wouldn't hurt!

Weeze