Fox farms trio always need cal mag?

Hey guys If I'm using fox farms liquid fertilizer (grow big, big bloom, tiger bloom) Will I need to supplement with cal mag? I have a really big grow coming up in about two weeks and I don't want any of my babies to turn yellow and it looks like fox farms has most of what my babies need. Thanks in advance guys

I do with my ff nutes.

I mix d.lime in my soil now however. I keep a bottle of cal mag on hand always tho.

We'll see how they look in a couple months and I'll let u know which I prefer lol.

Cool thanks,