@Ribbit, at 3-4 svl length... He doesn't need to eat every day, 2-3 days a week is plenty. Only the young ones need to eat everyday. Night crawlers are an excellent staple diet. Yes the same 15-20 minute rule applies if you're tong feeding. Night crawlers have one of the best protein:fat ratio and a good calcium: phosphorus ratio as well. If you're only going to be feeding one staple diet, it is recommended to give some variety bi-weekly.