What do she needs? Whats leafs indicating?

It sounds like you've already taken some steps to address the issue, but you're still seeing problems with your plant. Let's break down the information you provided: Calmag and Additional Nitrogen: You mentioned giving CalMag and additional nitrogen initially. This is a good approach, especially if you observed signs of nutrient deficiencies. Nutrient Composition: The nutrient solution you're using has an NPK ratio of 4.6-3.5-2.3. This ratio indicates the proportions of nitrogen (N), phosphorus (P), and potassium (K). You're concerned about the low potassium (K) level. pH Monitoring: It's great that you're checking the pH regularly. Consistent pH levels are crucial for nutrient uptake. If the pH is out of range, it can lead to nutrient lockout, even if the nutrients are present in the solution. Concerns about Potassium (K) Deficiency: Your suspicion of potassium deficiency is reasonable, given the symptoms you described (tips and yellowing). Potassium is essential for various physiological processes, including enzyme activation, photosynthesis, and water regulation. Next Steps: Consider adjusting your nutrient solution to include a higher level of potassium. You may want to use a fertilizer that is specifically formulated for the flowering or fruiting stage, as this is when plants typically require more potassium. Continue monitoring the pH closely. If it fluctuates, it can affect nutrient availability to the plant. Keep an eye on other environmental factors, such as temperature and humidity, as they can influence nutrient absorption. If the issue persists despite adjustments, it might be helpful to share more details or images with the community. Visual cues can often provide additional insights into plant health. Remember that nutrient issues can take time to resolve, so be patient and monitor how the plant responds to the adjustments you make. If you have access to a community of experienced growers, their input can also be valuable for troubleshooting specific issues.

You need more Phosphorus and Potassium now that you're in flower, so yes your PK in your nutrients is too low.

With coco you need to keep them wet. You can not over water with coco. You also check the runoff water ec and ph and maintain it that way. If your parameters are off inside the planter you need to flush it until the proper ph is achieved, and reintroduce your feed. I have a soiless feed schedule on my profile page. If the ec is to high in the planter, then flush it to the proper level.