Update: Flushed all 4 plants last night with 6 gallons (they are in 3g pots) of water ph adjusted to about 7 and poured nearly a cup of water with half strength nutes in each. Measured the last part of the run off, after they had been sitting for about 15min. and the ph read about 6.5

p.s. - Tomorrow will be the 5th week of flowering counting from the day 12/12 was started.