So it seems that there has been quite the explosion in interest when it comes to folks doing DWC(deep water culture) growing. I have been growing in DWC for close to 10 years now and the reason I have chosen to stay with that method is because it is the most effective way to deliver O2(oxygen) to the root zone. I was told a long time ago by a very experienced grower that "Cannabis loves, almost above anything else, air to their roots"
This has rang so very true to me and it is the cornerstone of my theory on how I grow top quality cannabis. If you take a look at my roots in this picture
View attachment 561240 this is how roots are supposed to look when they have been exposed to lots of air. It is kind of like what happens to a pro athletes muscles when they use steroids.
I have noticed that a lot of folks are doing DWC now but are not using enough air to maximize all the other environmental variables. I have never had an issue with "staining" of my roots and I believe that is because they are healthy enough to transplant the nutes to the plant immediately therefore the nutrients don't stay in the root as long and therefore won't stain it. I have also never had a problem with Slime or Root Rot, basically if you pump so much air into them it doesn't really allow for any bad stuff to go on in the root zone.
So if you are currently doing a DWC grow or you are thinking about doing one, make sure that you are giving them what they crave MORE AIR!
Also from what I have found there are several different ways that the air pump companies can "rate" their pumps, some use Gallons, some use Gallons Per Hour, some even use Wattage. But you want a pump based on its Liters Per Minute of air output, and as stated above 50LPM into a 5 gallon bucket with a couple of airstones should rock that root zone all the way out!
You can see what the trees that were hooked to these roots look like by checking out the grow in my sig, thanks everyone for listening and I hope that this helps and if you are doing DWC you have the correct amount of air. Happy Growing everyone