Funny because I was just looking into that couple of days ago but all the coco auto feeders I found you had to have the res 1 meter above the pots ?!?
hope that is not the case but now I am going to be brewing some compost tea because that is suppose to be more forgiving for your roots, but the root slime problem comes from when I had the polarlight in my kitchen cabinet and the res was getting close to boil, the blueberry dwc shows no signs and water been perfect, so I am going to see how this goes with the blueberry + compost tea
Its really hard for me to go away from the DWC because I been using it for years and really love the method