Canoing

Not classic overwatering Canoeing upward means light/heat stress Tops affected more shows high transpiration Extra watering increased uptake which pushed stress under strong light Go back to consistent watering Slightly reduce or raise light Improve airflow Main issue is light/heat not roots 👍

Agreed, this can be a symptom of a magnesium deficiency. Leaves generally hang downwards when over watered.

environment -- climate or light. You can say it's not this or that, but that doesn't make it so. Overwatering doesn't cause this symptom. Plus, super easy to avoid overwatering. It's not a boogeyman.. it requires consistently bad habits. "overwatering" is constantly misstated. You can give too much at one time, but that takes an awful lot of water that any common sense would avoid -unless the medium is poorly constituted, no normal watering should ever cause droop or other problems. Always fully saturate. If it's soilless, need 10% runoff on top of that. The frequency is more often where people 'overwater.' If you aren't allowing enough dryback, it will eventually cause a problem.. may not happen the first week or first month, but eventually it is inevitable. this is something where the effect can be severely delayed, which makes it difficult to recognize cause of the effect. if you weren't watering consistently and causing dry pockets and an ebb and flow of moisture inside the substrate that allowed solutes to precipitate out of solution and continuely deposit and build up over time, then gave 'enough' water to fully satruate, that has the potential to cause all sorts of issues with a plant as all those older solidified nutrients goes back into solution along with whatver you added in the water.. but even if it was plain water, still has the potential to cause problems. Little glossy and slightly lush (on darker side), relative to a pic under grow lights. Possibly related to esoteric watering practices if deviating from the basics or if that's kosher, would be related to the formula or any mix of the two.

Magnesium deficiency, increase MgO to 300 ppm

Probably heat from the light or the light intensity or environmental. I can't see it being from changing the amount you watered.

Leaves curl inward as a protection mechanism to reduce their surface area to try and conserve water. You are watering too little, or the air is too dry, or your light is too intense/too close.