Try this:
You need to right click on the photo that you would like and select "copy image location" and put that on here, not the actual link from the url.
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I do not see any white spots in particular, it looks like some of the scutes may be wanting to shed, hence the copper-like appearance of them. 1.5" is still a bit small for shedding, though.
What is your setup like? What type of lighting do you have? Size of tank, total gallons? Where did you get your RES? We will need more info to be able to help you out!