I do the same thing. I just bought another set. 24 blumats and overall I'm still very happy with them. I took a 6 day vacation recently and they performed great while I was gone. I'm actually going to be adding these to a hempy smartpot coco setup. Can't get any better than that imo.
How does that work?
Is it still a hempy if there isnt run-off to fill and replenish/refresh the reservoir space under your coco?