PPM not changing in flower

Hey guys,
I am growing in a NL Bloombox. I have 6 girls at 12 days into flowering. Canna nutes at full normal strength. 10 gallon res. 430 watt on 12/12. 3 strains. SoCal Master Kush, Fire OG and Purple Kush. All appear healthy, though I'm dealing with some minor PM. I'm also using a compost tea every other day. This is to assist in keeping the PM down, but I have some GreenCure on order, s/b here Friday. Anyway, changed my res two days ago and was at 770 ppm when it went in. Today, exactly the same. Don't get it. Flowers are growing, all appears well. What do you think?

How much H2O is missing? IMHO if the plants are drinking and the ppm is the same, you've got potentially the perfect mix on your hands! It means your plants are both eating and drinking. This combined with healthy growth means you're likely doing great.

ReM (assuming you mean powdery mildew), get some Serenade and bomb the shit out of them during your dark period. Tops, bottoms, and stems. Only thing I've ever had work. At 12 days it's no stress. PM is my arch nemisis",

Happy growing. Hope this is helpful...