I bought it on ebay. It didn't arrive in time to spray the eggs before I put them in the bator but I did spray all that were already in it. I did spray some eggs I'm testing for fertility and 2 out of 3 showed veins on day 5. I have a couple more I sprayed and let dry before I put them in. I'm waiting a few more days before I check them. I'll definately let you all know how it does.