The fish is a 5 inch sengalus bichir living in a 75 gallon tank. It had been living with a four inch oscar baby until very recently. It hasn't been eating well for the past two weeks (if at all). we had tried all sorts of fish foods ( frozen shrimp, brine shrimp cubes, hikari sinking pellets for carnivores). Today I found it at the surface laying still upside down in the shape of a U. It moves occasionally, but when it does it seems wobbly. A week ago we had to do a large water change as we had to move the tank. The tank also had tiny white worms that came into the tank with bought plants. These worms were not parasitic.
Any Ideas?
Any Ideas?