Clawing/Browning Leaves

I currently have 3 plants, all the same strain. I am using a living soil blend which was recently top dressed. The plant in the 3 pictures below started showing signs first and is further along than the other two plants. The other two are just now starting to claw on the bottom leaves. The first signs I saw were the overall green color on the plant started to fade evenly, although this isn't happening on the other two currently and the green has started to come back, so I think it just needed the top dress. The clawing and browning of the leaves is the main issue. It got to 60F the other night for a few hours and i put a heater in which runs at lights off now. night temps are 65-67 and day temps are 70-72 with RH of 30-45%. I water with 6.0-6.5 PH dechlorinated water. I still think its a soil PH issue, but i'm not sure what is getting locked out and how do I fix it?

What do yall think the problem/solution is?

I would bump the heat up closer to 80 and probably raise the RH a wee bit, but I dont know if that is where your problems are coming from. How often do they need watering?

Looks like the clawing is from N tox and the color at the top is from light burn..
VPD Chart

HydoDan said:

Looks like the clawing is from N tox and the color at the top is from light burn..
VPD Chart

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N tox is what a friend at work thought too. Given that i just top dressed recently with 75% seabird guano 0-11-0 and 25% gaia green bloom 2-8-4, I should be fine from the N tox after a few waterings?

DeeGreezy said:

N tox is what a friend at work thought too. Given that i just top dressed recently with 75% seabird guano 0-11-0 and 25% gaia green bloom 2-8-4, I should be fine from the N tox after a few waterings?

Click to expand...

What type of living soil is it? Did you make it or buy it? The N toxicity isn't from the guano and gaia.

Maybe get soil and tissue tests?

Johnny15 said:

What type of living soil is it? Did you make it or buy it? The N toxicity isn't from the guano and gaia.

Click to expand...

This is the problem. I guess I grabbed the wrong bag, just checked and the bag of soil I used had slow release nitrogen already in it. thanks

Did this ever get better and did you use build a soil ?