the tops of my plays are dying !

Hey guys , I'm currently on my 4th hydro grow and the tops are dying just the tops. It may have gotten to cold a few nights ago but I cut off the dead stuff and went to half bites just in case and have been monitoring the Temps closely. I'm currently using general hydroponics grow, bloom, micro, koolbloom , and a roots (bleach substitute to keep the roots white and root rot free.) Roots look great lower branches look great it's just the tops. The strain is blueberry.

Too close to the lights. Too hot. Do you have any fans blowing across the canopy?

Google baron

Did you say you were using BLEACH on your roots???

its all air cooled I am using au roots at a very small amount which is specifically made for hydroponics the plants are approx two foot from the lights

I changed out the water with half nutrients and no au roots added when lights turn on I'm going to cut all the tops off that are dead plenty of growth underneath to take its place does anybody think I should send them back to veg to recuperate a bit they've only been in flower for about 10 days opinions?

Sulfer/boron deficiencies will do that to buds i believe. Mainly severe sulfer deficiency kills buds. There is a thread on RIU that i read that on.

fireblight