I have two white clouds that successfully moved from my old 5 gal. tank into the new 20 gal. I also have neon tetras, some greenlight tetras and a guppy. I had others, but have been having trouble controlling Nitrate levels (new tank, I added fish too quickly), so I lost a few.
I notice that over the course of a day or two, the white clouds will dramatically change colour, from pale almost transparent, to very dark, with markely noticeable red patches. Does anyone know what causes this? I have yet to really keep track, to see if it's light conditions, or something else.