This is my first year using Chris's V-18 racks for my hatchlings. I used 6-qt. tubs previously, but I love the versatility of the V-18s that allows me to skip the 15-qt. tub stage. My first clutch in the V-18s is taking longer to start feeding than I have experienced previously, but one clutch isn't enough for me to conclude that it's an issue with the tub size. And Chris is absolutely awesome to work with!