welcome john. im not sure how big a cricket tub is. misting them a little two or three times a week would work, as long as the substrate doesnt stay damp after they shed. at the dollar tree stores they sell 10 packs of very small tupperware type containers that work great as water bowls in small tubs. get the round ones so they are more difficult to tip over. you dont even need the lids. thanks, scott erycine1@aol.com