I used it for a couple years and hatched out several clutches each season.My females normaly double clutched and i even had a triple clutch one season.Well it depends on how many females you have and how many eggs each lays.If memory serves me right i placed 2 clutches or 3 if they are small clutches in a hovabator.This was up to 14 egg clutches from each female.I used tubs i bought from walmart and i will post that info on the sizes.See next post for this info