Hey Echivarriaf, unfortunately you have some root rot going on They look pretty brown and slimey. The challenge with dwc is to keep enough oxygen to the roots. I noticed your reservoir is running 80f. At that temperature the water can't absorb enough oxygen to keep the roots happy. You want to try to keep it below 72 to avoid this issue in the future. You can rotate some frozen water bottles to help keep the reservoir cool. I use hydrogen peroxide to fight root rot. You can add 2 to 3 tsp per gallon of 3% peroxide to kill it. Your leaves look healthy enough to recover if you can get the temp down and the rot killed. You definitely want to get those girls swelled up as much as possible before harvest. Good luck with them!