I have a turquoise rainbowfish that is sitting ride under the filter and not really swimming around even when the other rainbowfish come up to her. She has seemed like she has a darker color to her also. No labored breathing or red gills though. She seems kind of confused when she swims, often swimming in circles. She also didnt seem too interested in food. She kind of reminds me of dory from finding nemo. Temp is around 82. There's a cycled aquaclear 50 on the tank. I cant test ammonia bc i ran out of it today but i can test nitrite/nitrate if needed. Tankmates are 2 turquoise rainbows, 4 Bolivian rams, 1 male betta(in a breeding net). All Juvies and in quarentine. Any ideas?