Tips of leaves Curling upwards

When you see symptoms you want to adjust your formula selectively rather than reducing the spectrum of nutrients. This is likely being slightly overfed Nitrogen, so you want to reduce nitrogen while limiting the impact on other nutrients as best you can. This is where tracking how you have fed can help inform on how drastically you have to react. If you have consistently given the same amount of N and it has taken a long time to show dark leaves and initial signs of curling, then you only need a small adjustment down for N ... stick to that new level on the next grow cycle and avoid the initial toxicity altogether more times than not. that light mix may have an initial charge, but before long you are providing 100% of nutrients. Treat it like a soilless context. If not giving 10% runoff, that may be the problem - if the EC has been rising over time, that is very likely the problem. The resting concentration of the medium does not have to your exact formula.. they key is that it stays consistent over time. that is what the 10% runoff ensures. This eliminates any cause of symptomsm related to buildup - it's 100% about the ratio and concentration of what you dump into it... you simply adjust the formula and the medium will transition proportionally to new formula very quickly.

I dont really visually see any issue from the photos bud, looks good to me, has she just woke up or been put to bed? Personally i wouldnt worry if i was you, dont over complicate her just yet, leave her for now she looks fine. Message if you need further assistance. Hope this helps or easies your mind a

shes overfed. tip curn can be from Heat RH or light extreames

Tips creeping upwards across the margins is always a cooling related issue. Or rather she is running out/low on water at some point. Near the end of a long day of high light and temps she begins to conserve water as roots sense moisture levels once they get low the plant no longer has the water supply to maintain the cooling of the heat from photosynthesis. Plant slowly starts to sacrifice the least important parts of the leaf. Which is the tips. This tells me the plant is dictating damage control.