Hey Y'all, Our black molly, Ama, has been acting funny lately. Swimming with him tail up and having trouble swimming down. I fasted him, but still the same. Still super peppy and zippy and always hungry, but swimming still funny. Now, he has weird silver patches on his sides, as you can kinda see in the pictures. It only shows in the light, which makes it harder to get pics. Any thoughts on what this might be and how to treat it? He's in a 40 gallon, temp is 78, aquarium salt added. Nitrites and ammonia are 0, pH is 7.2-7.4 Thanks in advance for the help!!