CRITICAL 2.0 - FIRST GROW

This week I started to bend plant under the SCRoG net. I have my new instruments to verify nutrients solutions quality. I switch my water schedule to 1,5 lt of nutrient solution/3 days TAP water in my facility is 200 ppm (500 scale) so I added nutrient to reach 550 ppm. I'm trying to measure PHand TDS in the root zone. result is 6.9 PH and 450 ppm in the soil after 3 days. Babies are been distributed through the net, it's possible to see almost all the main branches with their calyx pop out from the net. (see photos)