Try switching to Dynagrow 7-9-5 and follow the direction on the container. I don't think 250 ppm is enough. I'd consider 750ppm. It looks like you're missing micro nutes and dynagrow has most of what plants need for well-rounded fert. Try that and see what happens.
polishpollack Reviewed by polishpollack on . Yellowing/Browning of leaves in early veg First time grower here... Running a E&F 40 pot system w/ two 55 gallon res in a grow tent under four 400W induction lights. After receiving the clones from a grower I immediately put them in 4" rockwool and into the pots using 1/4 strength nutes. after 4 days I'm noticing yellowing/browning at the tips and a little downward drooping. The pH levels are at 6 and the ppms were at about 600. I dropped the ppms down to 440. The temp is running at 70F and the res solution is at around 70-75F. Not Rating: 5