Green sand or nitrogen toxicity?

Added some green sand to the plants for a fungus gnat problem. it helped, did its job (layer of greensand on top of soil. its been about 1.5 weeks and things were fine, this morning i noticed the claw, some pointing up, some pointing down. Ive also noticed a little discoloration in one plant. could this be due to iron excess? or over watering. Im giving them about 3/4 - 1 gal of reverse osmosis water (plants are in 10 gal pots, 3rd week of veg. diesel fire og. only happened to this plant. Running living soil, topped with an organic mix from a local grow shop. plants love it. using a biweekly terp tea, with neptunes harvest fish and seaweed mix, og biowar 1x biweekly (root and nute) foilar spray feed every other day (ro, coconut water 1:4 ratio, b52) only this plant affected

Yep looks like it’s clawing from a bit too much N but it’s fairly minor and should recover quickly. Next time use regular play sand And/Or diatomaceous earth on top for controlling gnats. Green sand is actually a good NPK input if you put it into the soil as an amendment. Save any extra for when you recycle the soil. At least you know your mix is active enough to begin decomposing green sand in ten days or so; not a bad thing really.
The fix is water as normal; the plant might even look a bit worse before it gets better but green sand is such slow release it will not burn like soluble nutrients can. Cut back on feeding soluble sources of npk for a couple weeks while this recovers. I expect that will happen sooner rather than later.

Thank you for the input. I figured thats what it was. Ya the soil is pretty active. Coconut water and aloe does wonders for your plants. Homegrown mycellium.