Help,
I had 19 rummynose tetra in my RIO 400 but 2 have died in the last 2 days. They have no signs of disease and water conditions are good (PH 7.4, Ammonia 0, Nitrite 0, Nitrate 40, Temp 25)
The tank has only finished cycling before the weekend and I had introduced the Rummynose over this...