I am starting to have my doubts about the whole self watering system with the nutrient solution. The self watering system is useful for holiday watering when you are away for day or two, but if you add the nutrition solution in the pots and continuously feed the chilis with it, there will be a salt build up and a nutrition lockdown in the imminent future.
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I am going to return to the tried and true top watering thing for the nutrition solution as it will wash away any salt build up every time you water the chilis after the coco coir have dried some before adding more water to it. It is ok to test new thing out, but if it doest work like you want it to work, you should return to the one that have been proven to work in the long run.