Canukseeds GG#4 fast fem

I would appreciate any input or comments that could help my crop as I am a first time grower , My plants had to go through surgery this week at first I thought it was the light causing the brown leaf but I raised the light cut the brown tips off but seen the plant didn’t get better , realized it was by nutrient burn because I check my plants PH it was 7.5 so I ended up flushing the plant about 3 times these girls seem to be dealing with the stress great I assume but some new leafs got yellow tips don’t know what’s going on but I will let her dry out before I do anything else to her and