My breeding experiment came to a halt today when I found my last 2 female rasbora (maculatus) floating belly up. These 2 look like yesterday's casualty, their eyes are bulging and appear to have been bleeding, bodies a little fat but not too much different to what they usually look like. No pineconing or other obvious things that I know of. Do they look like any particular ailment you could put your finger on or just another slightly mysterious fish death?
Other details/incriminating evidence on me:
Tank was divided in 2 with 3 happy alert males on one side, females on the other in a floating 3 litre lunchbox with some plant cover. Females possibly a little subdued compared to the males who were swimming in the current, possible cause being fishy-unhappiness?
Ammonia and Nitrate both 0, pH, hardness, temperature etc all normal.
Presence of daphnia in the lunchbox with them. Can you overfeed on live food? They weren't dashing for the food when I was there, compared to the males who were. There were still daphnia left in there today, whereas the night before they were all gone.
I bought them on Sunday only, none of the ones in the shop had their usual orange colour, I put that down to the fact that they'd only arrived that week so hadn't settled in yet.