There is nice amount of hairballs forming, looking healthy. Water pump was clogged 2 days but lets hope nothing major issue happened in roots that time, roots was still moist cause evaporation water in tank.
Day 9: 15l water, 40ml flores
Day 13: 4l only water
@Sany59, Do you mean that silver/metal plate top of nft tank? Same purpose as cardboard thing what they sell just to keep light out of reservoir and roots. Friend made me this stainless steel plate so i dont need replace every grow that cardboard plate. 😊