Cal/Mag nutrients: How much is too much?

[Dank1231]

I could be wrong but it looks as though my plants may have mag def. It may also be nutrient burn. If I were to flush them and dilute the nutes in the future. What can I do with the Cal/Mag? How much is too much? And if the pics below look as though it may be some other deficiency all together please give me your feedback. I'm obviously an amateur grower.

I'm using 1600 watt LED grow light bought from USA. Soil is FFOF. I have 2 fans circulating my grow tent and a CO2 bag (ExHale). My nutes consist of A.N. PH Perfect Grow Micro Bloom. Also I mix in CalMag before the nutes. (Same Water). I stopped using "fish shit" a soil conditioner they sold me as an alternative to Voodoo Juice. The plants are AK-49 Auto flower. They are all supposed to be same strain but they look a little different from one another.

 

[vyserage]

Make sure your pH is in the correct range, i didnt see you mention anything about it.
Whats your PPM look like?
I'd say mag def., those lower leaf's wont recover but if you correct the problem, they wont continue to deteriorate. You may not have to do a flush, just try adding 2x the amount of calmag (assuming you are using 1/0/0 calimagic, so 2 TSP per gallon of water) for a week or 2 to see if it helps. I dont know AN's feeding schedule, but in what way have u been feeding? (Water/feed/water/feed). For my soil plants i noticed with GH trio nutes, i rarely do a watering and am just feeding them every time they go dry, else ill see deficiency's.