I think you could candle as much as you wanted, just no more than once a day. I don't know what that would do, if anything. Oh, and just a tip, ou don't have to have a candler to candle eggs. You can simply do it by putting a flashlight up to it, and with the hand holding the egg, just put two fingers around the flashlight, so the light isn't glaring out. Works great!How often can you candle eggs in the first 2 weeks or so. And can anyone show me what a blood ring looks like?