ive seen the same one in that tank for at least 2 years now. Always has a nice red and white colourHow long have they been there? IMO stay away from dusters unless you plan to feed phyto to a green tinge. I do, and they have thrived, but most do not, it's a fanciful thing for some to purchase them, and then watch them die. They don't eat detritus or anything like that. Tank here is 25 + years. Listen to @Isopod80