I hatched hundreds of chicks in my three "styrobators" over the course of about a year and a half. I then upgraded to the a $$$bator with a humidity pump, but still use the sytrobators as hatchers. That way I only have to sterilize the cabinet about every two months instead of every 21 days!
Yes folks , that's ding dong's ( me) bator with a few to many drops of food coloring in trough #1!!! I hope it's fine cause "too late now" . makes me question how sterile the foam is though . I spray them down with biokleen after hatching... But the dye went ALL the way through. Maybe I should start saving for that nifty $$$ bator with the humidity pump!?!
It'll be fine, I never saw the point in the food coloring, once the water tray is stained it would be difficult to see the difference anyway. I just always monitored the humidity and squirted more water through the vent hole with a syringe. I use a large bore syringe with no needle, about half full will raise the humidity about 10% (for me). If that's not enough, I just squirt in more and point the squirt in multiple directions.