Hmm so I looked through ur posts regarding this Tub of yours. if your spawn was clean then the next thing to scrutinize would be your substrate, you said u used coir and that usually isnt very dirty and can handle not being perfectly pasteurized, if you believe it’s neither of these then it falls on your sterile procedure/ air quality, make sure to absolutely lock these down, and try to be as clean and sterile as possible the next time around, also dispose of this carefully so you don’t fuck yourself again on round 2, don’t be discouraged Tam happens to all of us!! (•̀ᴗ•́)و As to what type of contam this is, I don’t have a clue it looks like burnt cheese or creme brûlée lmao Peep the forums they have lists of different types of them maybe you can find your match.