The Congo tetras which were on sale were all females and looke really dull. Apparently , people had bought the male ones. So, I bought rummy noses instead. The LFS got them the previous night and were literally colorless(they noses were white). So I bought 3 of them. The LFS ADDED methyl blue to the bag. I drip acclimated them for 1 hour or so. I introduced them to the tank. I added a few HikarI Discus Bio-gold pellets and they pecked at them. But they still seem colorless. The red on their nose hasn't come back. How long does it take for them to adjust to the tank and show their amazing colors. Thanks In advance!!