Leaf tips browned. What nutrient problem is this?

Browning of leaf tips and signs of burn or discoloration along leaf edges could be indicative of various issues. It's essential to consider a few possibilities: Nutrient Overdose: While you haven't increased the PPM recently, it's possible that accumulated nutrients in the soil may be too high. Consider flushing your plants with pH-balanced water to remove excess salts. Potassium Deficiency: Potassium deficiency can cause burn-like symptoms. Ensure your nutrient mix is balanced, and consider adding a potassium-rich fertilizer if necessary. Secondary Nutrient Deficiency: It's also worth considering other secondary nutrients like magnesium or calcium. Ensure your nutrient regimen provides a balanced mix of essential elements. pH Imbalance: Even if you maintain an appropriate pH range, check for pH fluctuations. Fluctuations outside the optimal range can affect nutrient uptake. Flush your plants with pH-balanced water, reassess your nutrient levels, and consider adjusting your nutrient mix to address potential deficiencies. Monitor plant response closely after making changes.

I was lookin into your Diary, and i only see a happy plant, well trianed. dont care about some markings, you are more than half way through the grow no excess np defiency maybe the jagged outline will show some markings, but in common everything s fine

Runoff ph? And a pic with the whole plant might help.