Ph in a stagnant hydroponic set up

Im so lost in the area of the right ph i think its 6.5 but unsure for my stagnant hydroponic grow please :pray: help me

I start at 6 with my nutrients, during veg I let it swing towards 5.5ph and during flower I let it swing towards 6.5ph…be prepared for your girl to take control of the ph from time to time

Thats what ive been reading its crazy how the girls can change everything and gulp a gallon of water out of no where change all the balances man think about it they really are just like my daughters