First coco grow. Do i need to supplement calmag with canna a+b?

Indoor Growing
3

I grow in coco and I would say it depends. What kind of water are you going to use? I use tap water which has calcium so I just add Epsom salt and drop the Calmag. When using RO I add the Calmag and skip the Epsom salt. Also as stated above I don’t know those nutes. I use GH trio.