runoff pH is 5.5, trying to compensate with plain water at pH 7.(is it a good idea?).
Also they are not doing as well as the outdoor plants (fewer and smaller leaves). So I took them outside for few days, and see what happens.
The diff.between outdoors and indoors plants is the light., Runoff, and runoff ppm. And temp.
SF 4000 indoors at 600 ppfd temp 75 frh vs sunlight at 600 ppfd 85 frh.
Outdoors get runoff. Indoors didn't, now they do.
Also high runoff ppm (1500 vs 300 outdoor). It could be the problem.
Will post new pics in 2 days.
Thanks guys.