Nutrient deficiency or pest?

Judging by the fact that your plant is so small and you are talking about the balcony. So we are dealing with very weak rays of light. With the breadth of the Earth - where the sun is probably not so strong. Or maybe you put a pot in the place where the sun shines weakly. Understand the beautiful thing = lamp, a bulb from the store for 1 dollar, 2 dollars = very cheap = will make your bush much larger, tastier and more sugar than all these dances on the balcony Ordinary household bulb = twice as much bush will make you And according to your plant = download the luxury application on your phone and measure how much light power falls on the plant. In appearance there is about 10,000-14000 suite Well, everything should be 30,000-40000 suite They figured out the light but how to understand how many fertilizers are pouring? = Buy yourself TDS meter = they are very worth And measure your basic fertilizers to the desired dialogue, such as (in your case), 400-500 PPM maximum. It will be impossible to open with such a weak light a flower, if it will continue to grow, then this is 5 grams if you are lucky. You should not think about the lack of substances at all = because without good light = there will be a lack and an excess, but there will never be a normal beautiful plant. Parsley, dill for salad, but not to smoke. Your pair of bucks do not cost a weak bush 2-3 -4 months.

Toxicity ? Hmm what symptoms of CalMag tox can u list ? Let,s see... https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987#calcium And https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987#magnesium Come on, don,t be shy

Stop using calmag. You have a toxicity