Good to hear! hows he getting along with the peacocks? I agree giveing him a day or 2 off everyweek from feeding is a good idea, if only to let his digestive track take a break. He should grow pretty steadily to the 18" range threw winter. at about 16"-20" krill shouldn't be an issue with feeding. But if your not haveing an issue with the worms imo I'de keep him on them. I've tried a handful of foods and nightcrawlers seem to keep mine at the peek of health. at approx 1/2"- 1" per month of growth was pretty standard for mine. frozen foods such as krill are good to get them on incase you ever have an issue with your worm colony, and variety is never a bad thing.