Fish will eat all critters small and wriggly
Culturing Paramecium:
Paramecium is a ciliated, slipper-shaped, single cell protozoan. Easy to culture and feed to small fry. It has 2 advantages over infusoria.
1. Infusoria reproduces rapidly and if not eaten by fry will pollute the tank. Paramecium use very little oxygen and if cultured in a sealed jar, a pure culture can be maintained as other infusorians die due to lack of oxygen.
2. Paramecium can be seen with the naked eye but are still small enough to be eaten by the smallest fry.
Prepare a jar or wine flagon by filling with tap water and letting it stand overnight. Add paramecium culture. They feed on any rotting vegetable.
One of the best methods of feeding a culture is on a sliced turnip (approx 40mm x 20mm x 30mm) dried in the oven. 2 or 3 pieces will keep a culture going for 3 - 6 weeks, when the culture should be restarted. The frying of the turnip prevents a scum forming on the surface. Place cap on container and stand in light, but not direct sunlight.
If a starter culture is not available, a banana skin is placed in an open container for a few days until the water turns cloudy. Remove banana skin, add some dried turnip and seal container. Spoer will have settled in the water from air and in a few days will clear and the paramecium will appear.
Feed to fry by siphoning from culture, replacing the water removed with fresh water.