This is just an FYI. Calcium should be the first thing you should add to a new mix of nutes... Unless you're using Silica, then its first. Adding it to a full res of nutrients can cause lockout issues. I prefaced this as an FYI because I found I could get away with it with Botanicares Calmag, so I do augment calmag without a res change during Veg quite a bit. I use a different.. Calmag in flower.
IF you decide to add Calmag like this watch as you pour it in. If it clouds up your watching nutrients shut down and should probably do a nute change. Clouding like this doesn't always happen, but if you see it you know whats going on.
Do a foliar feeding with Calmag. Tomorrow do a foliar feeding with your "bloom" nutrient or PK booster... your looking for Phosphorous. Mix it up 25 %ish as strong as you would for dirt.