Pellets are easier to measure

Pellets make it simpler to count portions and avoid dumping too much food into the tank.

Flakes can be messy

Flakes can break apart, sink, or spread around the tank. Uneaten flakes should not be left to decay.

Quality matters

Whether you use pellets or flakes, choose food made for bettas or carnivorous tropical fish and avoid feeding more than the fish can eat.