The plant looks good. In these days the temperature outside are very cold (about 5 celsius), but in the box there is a electric radiator connected to a control unit (inkbird): every time the temperature goes under 20.7 C the radiator turn on. Yesterday I broke the holding pulley of the lamp😰 so I had to hold it with a wire. it will remain that way for 2 days, I've already bought a new pulley from internet. Anyway I defoliated the purple punch to bring the light to the apicals. Every 3 days it puts out new leaf, incredible! I used 10ml of flora grow , 6ml of flora micro (hard water) 5ml of flora bloom and 5 ml of cal-mag directly in the solution
edit: I resolved the problem with the lamp. I top up the solution with 10l of water in wich I put 20ml of flora grow, 12ml of flora micro, 6ml of flora bloom and 10ml of cal-mag. I also used 10ml of pH- directly in the solution to lower the level of the pH (6.3-6.4 at the moment). Everything look ok😀