The need for a continuous supply of live food or of moving suspended food particles in the early days of the life of the fry may be supplied by drip feeding. Many successful breeders never use this method, and it is certainly not necessary, but perhaps an equal number feel happier if they do supply it. Since one purpose of keeping fishes is to enjoy feeding and caring for them as well as looking at them, why not do it if you like to? When a spawning is planned, an infusorial culture should be on the way, in case it is needed. But if it is not produced, use an egg or yeast suspension instead. To feed by drip, it is necessary to siphon the culture very slowly over into the tank. It is not usually necessary to supply a drain for overflow, but a gadget for the purpose will also be described.
The main difficulty in drip feeding is usually to get a slow enough drip, but this is achieved very easily by means of the device illustrated. A 1/16 -inch (internal diameter) glass tube is bent as shown and inserted into a cork or other float. This diameter tubing fills itself by capillary action and will drip at 1 drop per minute (3 cubic centimeters per hour) or faster, as long as the end of the tubing is bent upwards as shown. If it faces downwards, the minimum speed will be about 40 drops per minute, and that is too fast for most cultures.
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