Hi there, new to posting on the forum. Have been lookie-looing for a while now and figured time I get in the game. I have been growing with hydro for over a year now and after many different DIY systems I landded on the Ebb and Gro (bought a controler, the rest came from hardware stores). I use a four flood feeding and am using Advanced Nutes.
There is an inherant problem with the ebb and gro in that an inch or two of water is left standing in the bottom bucket after a feed. This leads to root rot/pythium about 2-3 weeks in bloom. CAPP company put out a video on a fix for this that involved placing 2 inch pieces of pvc pipe 1-2 inch in diameter under the inside bucket to elevate it. Works for a very short time, until the roots grow long enough to be sitting in the water. I have two fixes that work much better and are simple to do.
The first fix is simply elevating the plant buckets 1.5 inches above the controler bucket, I used some foam insulation I had laying around. Cut some one foot squares then raised one edge of the foam so that the fitting in the bucket is on the lower end. This allows for all, yes, all the water to drain back to the controler.
My permanent fix to this problem costs a bit more and actually increases the yield! Who isn't for that? I make my own buckets out of 2.5 gal paint buckets from Home depot ($2.18 in my neck of the woods) but you can alter the original buckets that come with the complete system too. I drilled a 1/4 inch hole in the bottom of the inside bucket and fed an airline through it so that it protruded one inch below the bucket. Taped the hose to the inside of the bucket, then added the grow media and plants, hooked these up to an air pump (this was the major cost, $60.00) and now the water in the bucket is no longer stagnant. The extra air provided to the roots has boosted growth and yields.
Hope this helps anyone using this system.