Mg Deficiency?

Hi this is my first grow and I'm vegging california orange(feminized). they are ready for flowering but one is much taller that the other, the short ones has something wrong with it. at first I noticed a few slightly deformed leaves growing than noticed some curling like a tongue (up at the sides). Both of the plants have crispy burnt tips (I think from over fert). Now I've weakened the nut solution and yellowing leaves started with green veins on the bottom new growth.

SmallPowerzzz

I have a hydro ebb and flow (18.9L)
with dutch nutrient formula(DNF) (mixed for 15L)
2 floro tubes (430w HPS for flowering)
sorry no pics yet

hows the heat

78F with 68% humidity and the smaller plant with the curly leaves is in the corner under the hot part of the floro.

sounds like heat with the curling. those temps are they at the tops of the plant?
how close are your nute mixes to this recipe,weekly is more for soil but does work for water.


Week one begins when clones are rooted & planted, or when seedlings have 3 sets of true leaves

Week One: 14tsp One GROW + 2tsp Max Grow
Week 3 add: 4 tsp One GROW + 1tsp Silica
Day 1 of 12/12: Flush & refill adding: 18 tsp One Flower + 2tsp Max Flower + 1 tsp Silica
Week 5 of 12/12: 4 tsp One Flower


WEEKLY: (per gallon)

Week 1: 14tsp One Grow +2tsp Max Grow
Week 2: 16tsp One Grow + 2tsp Max Grow
Week 3: 18tsp One Grow + 2tsp Max Grow
Week 4*: 20 tsp One Grow + 2tsp Max Grow + 1tsp Silica
* use this until 12/12 if vegging longer!
Week 1, 2 & 3 of 12/12: 22tsp One Flower + 2 tsp Max Flower + 1 tsp Silica
Week 4: 20 tsp One Flower + 2 tsp Max Flower
Week 5: 14tsp One Flower + 2tsp Max Flower
Week 6: 12tsp One Flower + 2tsp Max Flower + 1 tsp Silica (if need more time till flush, repeat weeks 5 & 6)
When You flush: add 1tsp Silica to 1 gallon of water and use as the final flooding after you flush them well!

i'm in week 5 of veg for the big ones, since i noticed that there were burns(i thought from over fert) i switched to a weaker solution

15 tsps of both A+B
(A=2-0-2)(B=0-1-3)
7 tsps of black which aids beneficial fungi growth and reception of nuts + enhances flavor+color
(black=1%N, 1%P, 2%soluble potash)
so this is enough for 15 L and my reservoir is 18.9L
i don't have silica what does that do?
the temp at the tops of the plants is 82
...so should i add more nuts? I also heard that some people add a rusty nail to the reservoir what do you think?

never heard of the rusty nail and i believe the silica is for the ph. not 100% i dont use this stuff just a recipe i had for it. and i`m in soil

thanks for all the help, the chart pointed to K deficiency due to me using baking soda to balance the ph. I'll need to get something else that doesn't cause salt issues.
Thanks again and talk to ya later.