If your res isn't cascading vigorously and you can see bubbles and turbulence where the return re-enters it, definitely hook up an aerator.
stinkyattic Reviewed by stinkyattic on . Vertical NFT Flowering Problems Hi, I have two plants that are 3 weeks into flower(12 on/12 off lights) and are looking sick, and im not sure what the problem is. Any help would be appreciated, I have set up two five gallon buckets on top of each other, using the bottom one as the res. I drilled 2 holes up through the top bucket for the drainage tube and for the watering tube. I ended up using gravel for the substrate. Im not sure if that is what is causing all the problems. Growing Vertical NFT Medium is Gravel I am Rating: 5