I didn't closely track my EC last grow, so have no good reference. EC has not changed in 4 days. I'm used to seeing it drop slowly over time, around 0.05 to 0.1 per day. Recently I only see it go UP a bit as the water level drops. Adding the equal amount of lost water returns the EC back to the previous state.

We're in week 9/10 now, so this is late flower. They don't look ready for harvest yet, they look like they could use time to ripen.

I'm guessing this is probably normal, but Google didn't find me a concise answer in under 10 minutes, and I'm impatient.

Picture because pictures are fun