Get ph down bro ...I ph my water before it hits the tubs feed and regulate from there...Are there plants in it? No more vinegar.. If nothing else it stinks..LOL U should be feeding them 1/4 strength nutes when the roots hit the water either way.. 300 ppm sounds nice.. bump it to 600 week 2, by week 3 at least in my system they are a foot tall and go to flower...hope that helps.