Hello!! We have 2 black mollies, a golden panda molly, and a guppy with a few snails. Tank has been up and running for about two months. We’ve had the fish and snails for 2-3 weeks now. Now it looks like Panda is losing her color in spots. Her scales aren’t raised, there’s nothing on the scales, and it kinda looks like maybe the scales are gone? I took some pictures, and input would be appreciated!