I have two firebellied toads, which I bought about 1 week ago. One of them, the male, has developed two bright green spots on his back - one that's really small and one that is sorta small. The spots have been there for 2 days, and the frog is a lot less active then it has been (except for his croaking - he's croaking a lot). I have a ten gallon tank with an underwater filter. I started turning on a heat lamp to keep the tank at about 70 degrees f, about 3-4 days ago. I turned off the filter today and the frog seems to be a little more active, but not as active as he was when I bought him. Could the spots be from stress, from a scratch from something, or a fungal infection? I can't seem to find too much info on it - either in the books I have or on the internet. Anyone got any suggestions? also - if I leave the filter off, how often should I do a complete tank cleaning?

