they will probably eat about 1-2 tablespoons (depending on how old and how big they are) of cgd mixture every 1-2 days. i usually leave it in for 48 hours before i take it out unless it gets moldy so that would be 1-2 tablespoons every 2 days. one jar should last at least a month.

once you start feeding them you can judge how much they need. if there is a lot of leftover don't make as much but if they are licking the dish clean overnight give them a little more.