Flopping, Gasping, Not Eating, Help

[callistra]

A bowl of this size should be cleaned at least twice weekly 50% 100%, but personally I would add a third 50% as your fish will still see ammonia.

These changes need to be same temp water (use thermometer in bowl) and acclimate by floating the bowl and adding a few tablespoons of new water to his floating cup every 10minutes for an hour.

Bettas in bowls will live 2 years on average compared to twice that+ in larger containers.

What is his temp with the new heater?