Hi, I would check the plant's drain during the grow from time to time. Measure the pH value and the conductivity there. The conductivity should be a maximum of 500 - 1000 µS above that of your watering water, and the pH value shouldn't deviate too much from that of the watering water and should, of course, be within the parameters (min. 5.8 - max. 6.8). Otherwise, flush it well with distilled or osmosis water until the desired values are reached. Ideally, the conductivity should even be lower, then targeted fertilization will be effective again.
Hope it helps in the next grow.
Cheers and have fun gardening!