The reasons why mosquito-eating fish do not eat may be as follows, and we should investigate them one by one:

1. It may be that the feed is unpalatable and should be replaced in time. The larvae of mosquito-eating fish mainly eat rotifers , ciliates, adults feed on insects, cladocerans, copepods, chlorella, and are especially fond of mosquito-eating larvae;

2. If the feed sinks to the bottom, the mosquito fish may not be able to see it, because they like to move in the upper waters of the aquarium;

3. The water quality is too dirty, which may cause the mosquito-eating fish not to eat. The water should be changed in time.