This is what looks like bugs. But could be plastic.
Haha well looking at your zoomed in version of my picture yes they look awfully like an infestation! I will double check now, it may sound strange to you but the room is newly built and pieces of plaster board do still get sucked through the plug sockets as dust and settles on the plants.
I only run my drip rings 2 hours on 2 hours off. I guess a lot of people run 24/7 and are fine. Seems like if you run like that your roots have no reason to establish a good full root system. When I ran Eb and flow I watered only twice a day! The hydroton holds quite a bit of water really.
I have certainly learnt the hard way that Hydroton does hold onto water longer than you may think, especially when you go off what you read online.
I am already looking forward to next time when I am armed with this knowledge. I think my plants are making a slow recovery, they seem to be drinking and growing again. I do not think I am out of the woods yet but on the right path
I followed advice on increasing the PPMs slowly and continued to feed once on a timer at lights on. I also think changing from H202 to Rhizotonic and eco thrive (bacteria) help the roots recover.
This is how they are looking a few hours into lights on..