lol. my first grow was dwc, i had a 5' tall plant in a 7 gallon round bucket. I hated lifting it, I switched it to a a ebb and flow before i was finished. But that one bag seed plant yielded 8 ounces. thats why i like dwc. I only ask about the resi, is because Current culture recommends a 40 gallon resi for a 4 x 8 gallon system. i wasnt sure if that was additional to the main resi return bucket.