You can also just use a 60W lamp light, or even just fill up a few quart jars of hot water arranged in a circle with a towel over the top so the chick can get between them to stay warm. Looks about a week old and 85F days sound just fine temp wise since it appears to acclimated to slightly lower temps already. No need for fancy dishes or water spouts. A coffee can with a hole in the side that the chick can reach into for food or water would work even so it wont fall in. With 50 deg nights, and I'm assuming "indoors" as in not drafty for now, the chick will probably only need extra heat for another month or so. A brooder can just be any bin too, like a cardboard box.