Baby mosquitoes is very good food for betta fish. Because natural of betta fish like to eat live food and sure it’s better betta food pellets.
Put water in the container then put animal blood or manure or water rinse fish ( select one only ) put fresh grass Example : feather grass 2-3 handful and float on the surface water after that observe next days will appear mosquito egg raft floating on surface water and this mosquito egg will be baby mosquitoes We can use fish food about 1 week.
style mosquito egg raft look like coconut bract upturned float on the water. Should be location at leeward wind and sunshade because mosquitoes like to put spawn this location.