Tubifex are part of the natural diet of many ornamental fish that search the ground for food. The 15-85 mm long Tubifex live in the soil and the blood pigment haemoglobin results in their red colour as long as they live. During the freeze-drying process, the red colour disappears. Unlike live and frozen food, there is no danger of introducing diseases or unwanted bacteria into the aquarium.
The JBL PRONOVO FEX "chunks" float on the water surface because of their buoyancy. The fish can bite off smaller chunks there. Alternatively, the chunks can be pressed slightly in the water so that their buoyancy is reduced.
To expand the diet of ornamental fish, supplementing their main diet with freeze-dried foods is highly recommended. The following types of food are available for this purpose: JBL NOVO DAPH (water fleas), JBL NOVO ARTEMIO (brine shrimps), JBL NOVO FEX (tubifex), JBL NOVO FIL (red blood worms).
Food size/mouth size:
It may sound obvious, but it is important that the food size fits the mouth size of the fish. Not all fish are able to bite off larger chunks of food. The fish size to which the food size fits is written on all JBL food tins at the bottom left of the front of the labels.