I have three Amano shrimp in my 23-gallon (together with four Cobra Endlers). I have some hair algae (not much at all, but certainly there are some hair filaments). The shrimp don't touch it. In contrast, in a Rachel O'Leary video, I saw the Amanos feasting on that stuff in minutes. My guys have been there for about a month now, and I don't think they ever touch it. I got them at PETCO. I read about not real Amanos hitting the market. Do all Amanos eat the hair algae, in which case mine are not real ones?