2 of those little clear mounted thermometers came with my incubator and turner. I had these in the incubator. I bought a humidity gauge (can't remember the name, a little gold circle with a reptile on it.) I set the eggs Wednesday night and kept the incubator at 99. Then I read that those thermometers are junk. So I head to petco and the only brand they have is a round one...petco brand. Feels flimsy compared to the humidity gauge. I bought it anyway and it's reading a about 7 degrees below the original 2. Has anybody used this brand? I didn't want to buy it simply cause its much larger and doesn't fit in the egg cup the way the other gauge does. I'm gonna try to get the one I want (with the reptile) today. Till then.....which one do I believe? Also...if the temp is off a few degrees the first 2 days, how bad is that? Thanks!