They could be drowning dude or at least over watering them. In hydro you must drain quickly. Fix your problem with proper net pots, there is a good chance you can transplant them. It's the roots that are blocking the drainage so they are bound for sure.
Zandor Reviewed by Zandor on . Weeping Hydro during Flowering... ZANDOR??? Ok... Zandor I had a couple suggestions to try and get your help. It's the 5th day of flowering... leaves are nice... green and big... but weeping!?! The weeping mainly occurs during the night... and slightly during the day... take a look at the pics... why are they weeping!?!? I have them being watered/flooded 15 mins on / 15 mins off... and fans constantly blowing everywhere... the temp at night is around 70-72ish... and during the day with the lights on around 78-80ish... why are they Rating: 5