So I started setting up a d.I.u. incubator that I saw and thought would be easy. Problem is it creates a lot of mold because of the still water. Its the kind where u heat water and put the egg tub inside the other tub resting half inch or so in the water. After a couple days it started molding real bad. Is there anything safe I can put in the water to prevent this? Ive thought about vinegar or maybe a water filter, but wasn't sure if the vinegar would be safe or off the water filter would cause fluctuations in the temp. I've seen the flaw in this incubator and will be switching to a different style, but am stuck with this for now.