Spots on leaves

Hey cpavan! Another trick you may want to try is to get the pH to 5.9 - you can be experiencing a very minor nutrient lockout as some minerals need that magic 5.88 number to start doing their magic. Below that and it has a bit more difficult time. Here is a quote from a site below. "When identifying nutrient lockout, first check the pH of the soil, water source, and nutrient solution. Generally, you want the pH for hydroponics to be between 5.5 and 6.5 and 6.0 to 6.8 for soil. When the pH is too high or too low, nutrient availability plummets and your plants cannot absorb the nutrients." I think you are surfing on the low end of the pH spectrum. Try getting it a dash above 5.88 - I go by 5.95 every time in Coco Coir, so it depends on the medium. 👍