Hello AA, I have an issue with some Hyphessobrycon sp. "HY511". I have 4, and 2 are near the bottom of a tank and a plastic plant. They are swimming alongside eachother, and twitching rapidly. Then one will chase the other around the tank, flare his fins at the other male (I have 2 males, 2 females) and chase her back to the same place where they will convulse next to eachother, swimming in small circles. There are no visible signs of disease and there are no visible eggs coming out of the female. What could be happening? I have done nothing to trigger them, they have eaten flake food for the past 4 days, and I did a 20% pwc
yesterday. They are semi-difficult egg-layers. Your input is welcome.
~ExoticAquarist, signing out