Taken on day 21 of flower...
since my last posting, (as a precautionary measure since my buddy had fungus gnats or root aphids or both), I treated with Bayer tree and shrub:
I added 30 milliliters to one gallon of water, and poured one gallon over the top of the hydroton in each pot in the system, as well as the top off reservoir.
so with a total of 270 milliliters in the entire system, I let it run for 2 hours straight.
I drained the system, ran five gallons of fresh water over the top of each pot, rinsed out the top off reservoir, cleaned out the inline filter, drained it right away, then added new water, and let it run for 24 hours.
I drained the system again, and dosed it to .6 EC.
three days later, I raised the EC to .7