You may not need to flush, if you have in the last week or so- it's possible that the tip burn is just residual scarring from before.
But getting those plants some nitrogen and a good healthy dose of a balanced bloom fert is important. That is much too early for them to be that yellow. I suggested fish emulsion because it has lots of calcium in it and will help to stabilize your ph as well as feeding the plants.
stinkyattic Reviewed by stinkyattic on . PROBLEMS STILL..PLEASE HELP Hello All I have written before mainly for ph reasons. Could I still have that? or are they hungry from the lockout? So here we go: S=Answer if you grow traditional soi E-indoor Vortex potting soil Lady Bug with 30% perlite Runoff ph 7 Water is tap with ph down to 6.5 to 7 using liquid ph test so hard to have exact numbers Tap ph 8 Rating: 5