Does this look like a low PH problem?

it's essential never to feed from the top after you turn the system on if you're using mineral-based fertilizer. It will push those salts that have accumulated in the top few inches back down into the root zone and cause your plant to burn. Not recommended to chop and change. Autopots operate by drawing water upward through capillary action from the bottom. Didnt make sense to my brain either at first but that's salt for you.

yeah, probababyl overfed it. A low pH would first lock out Ca, which is possible with the visible symptoms. Symptoms are not always discrete so it's wise to cross-reference with anything else to help verify. it's not just about the overall EC but the balance/ratio of nutes too. Something seems off even after you reduced overall concentration. would need a breakdown of elemental ppm of each to make a better suggestion. I prefer 6.0 ph because it gives more room for error and don't need to add more Ca to mitigate pH-inhibition. Ca++ is mostly likely to fuck with other stuff when in high concentrations too... as with all things nute-related you want 'enough' and not too much or too little. too much or too little can sometimes take a month or more to show a symptom. Take notes. be systematic. Fine-tune your formula and soon 99% of plants will be happy seed to harvest. There are apps that will tabulate elemental ppm of each nutrient just by typing in dosage and gauranteed analysis label information of each product used. in a well-balanced formula you may only need 100-130 ppm Ca. Depends on what comes in your tap water too. if any other portion of formula is whacky, it could cause a need for more than that, but that is more likely too much of something else, if so. ("mulder's chart" shows the complexity of relationships among the nutrients - they can inhibit each other or in some cases adding more of one will need an uptick in something else too)

Hey 👋 Yeah she’s stressed. I would move on like this: - feed her some CalMag. - adjust PH & wait 2 days. - measure EC, and feed based on EC level. More easy to fix underfed plant, than overfed plant. Especially when leaves already getting crispy. Hope she’ll do it.

Slightly over fed but her ph is low locking out calcium aswel.. Maybe giving a higher pH for next few water's try bring it back up to the sweet spot...

Your plant is clearly showing signs of stress, which can have several causes. One possible reason could be a pH level that is too low. The symptoms shown in the pictures suggest a nutrient lockout or even overfertilization, especially since the lower leaves are still green while the damage is appearing at the top. This makes an underfertilization unlikely. Another possible factor could be overwatering, depending on how wet the medium has been over time. My conclusion: A low pH is likely causing a nutrient uptake blockage, and excessive watering may be contributing to the issue.