It's important to notice that each kind of soil requires a different management!
If it's purely coco coir, in every watering, and if it has organic matter on it, you may use only every 15 days or so. And care with the dosage!!! 1/8 to 1/2 is the best option. I would use something next to 2ml/L of water and watch for deficiency, if any emerge i would give more( If the solution is inside that bottle, as it has no Potassium)