I use distilled water now but used to use tap water with a few drops of Oxine ah in it. The water evaporates pretty fast so it is constantly replaced with fresh water. I've never had a problem and I've been using the same incubator (an LG) for 6 years off and on. I've hatched everything from guineas, chickens and even a batch of Canadian Geese in it very successfully. I recently purchased a new Brinsea ECO Advance and so far, it is extremely easy and doesn't go through water quite as fast. I think as long as you keep everything very clean and sterilized after each hatch, you should be fine. Just my experience....Does everyone boil and cool the water before adding to incubators?..I have never added water in incubator wells. The thought of water sitting in a hot environment for 24 days with live embryos with porus shells sitting on top marinaing in who knows what kind of possible germs did not make sense to me. I think that was why I made the decision to dry hatch.
Angela


