[imaal]

I'm not sure i understand why unhatched eggs or eggs casings are getting into the tank. When you shut off the airstone in the bbs hatching bottle, the eggs float to the top and the bbs will settle around whatever light source you are using--flashlight, cell phone etc--at the bottom and can easily be siphoned out with airline tubing. Speaking of airline tubing, that's my siphon of choice for fry tanks.