I am! I found one cube is not enough for my taste. I also bury lava rocks under my clay pellets. I will be flood/drain but only clean water. I water by hand with nutes. More work but i like more hands on.
They make 6x6x6x cubes called Hugos
they also make 8x8x8 inch cubes called Big Mamas
hey have you ever reused rockwool cubes? works pretty good most times
