Looking good!!!
Was just looking through thread and hope this will help, good fix on intake and exhaust , air exchange is a must. IMO u need RO water (with cloramine filter) especially for dwc, u start with 0-50 ppm with ro and tap water is way higher ppm and most of the ppm in tap water can't be absorbed by root system due to molecules being to large, pretty much either interferes with uptake or just gets suspended if using a soiless media, also most ,,,, dam near all municaple city water has cloramine added to it (chlorine and ammonia ) which plants in general don't like. Even if u just buy a couple 5 gall water jugs and fill them at ur local water store ( which r set up with the most efficient RO systems) this will cure a ton of problems for u. Also b carefull using rubber made bins or keg totes or garbage cans for resiviors, a lot of them r made from recycled plastic and after a small amount of time u will notice a weird oil slick on top of ur water/nutrient. This is the plastic off gassing toxins in to ur water due to salts from nutrient degrading plastic. U will for sure notice ur plants will get unhappy.
Anyways this is all to help not to criticize, I hope thus run yield u a fat harvest and on to the next one.
