it's a safe temperature range for incubation but aren't the thermocontrol stats supposed to be better than that? where have you got the stat and therm probes? and what's your incubator like?
cornsnakes, ratsnakes, bullsnakes, boas and day geckos Location:Leeds/York/Selby area
if your stat probe isn't in the incubator it's not measuring the temps in the incubator, that's why there's such fluctuation - the stat is controlling and regulating the mat in the viv instead
cornsnakes, ratsnakes, bullsnakes, boas and day geckos Location:Leeds/York/Selby area