It's my first try hydroponics. Since my water temperature was around 22 °c I decided to choose beneficial bacteria approach, and work with them. I've inoculate my water using bactorrS13, i'm waiting for mycchor hydro, but for now we will see.
I've made a bio filter myself to gave micro life a support, a home.
I use 200 w quantum board, might try FIM.
I'm waiting for all your suggestions and advice.
Not trying to knock you or anything but I'm not sure what's going on here why does the water look like motor oil and why are your roots so dark and nasty looking I'm also doing my first dwc as well all home made . Very surprised plants are even standing. Yikes
Guess I missed a few pictures overall looks like you fixed something because its definitely starting to look better .I can see the potential and on a whole other note I'm not sure exactly what's being used but my friend did a dwc in his backyard shed using tap water 1 100w metal halide in Las Vegas summer so around 115 degrees o and using bag seeds from the early 2000s like over the border brick nasty weed seeds and that plant puts most peoples operations to shame I think people put way too much stuff in there grow. Hope this helps a bit wish i had pictures but they were taken and developed and been lost over time