Calcium or other?

[Noobmaster69]

Running wedding cake in a 4 by 4 tent using a four bucket recirculating system connected to a large reservoir
2x Mars hydro 2k watts 2x3 coverage
2 clip fans and inline exhaust
Currently using GH Lucas method one part micro two-part bloom
Ppm 1200 up from 760 (recently brought up the values when noticing the deficiency)
I am also adding calmag as of a week ago
Room temp 80f
48%RH
Res temp 70-74
using frozen gallon jugs to keep cool when over 72
... If I missed anything just ask me I just want to dial this in perfectly I'm used to soil and Coco and I still have those going as well but this is a new set up for me to try my hand at hydro

Update as of taking these pictures I noticed some scarring on the leafs any ideas???

 

[Aqua Man]

Ppm to high 400ppm is probably plenty.

Light is to strong. Driving them to hard when not healthy.

Rh is to low.

What is the source water and it's ppm?

What ph is your res and how much does it change in 24hrs?

How do the roots look? Pics.

What ph adjusting products?

 

[Noobmaster69]

I'm sorry I thought I responded to you ..@Aqua Man
Res changes in 24 hr are none to maybe+ .1
Using GH base and acid
Detroit tap water is rated because the great lakes ..I use the filtered tap water ppm's are 170.. using Floramicro (hard water) and florabloom...changed res and ppm's are now 620, seeing much faster growth now but still see slight def....
Also added beneficial bacteria this week for the first time to help combat what I thought was the beginnings of root rot...
No lower wattage light, can I moved it further away? He's LED lights I from Mars hydro allegedly I can dim them.. nervous to mess with it though.