Scouser
Aquarium Advice Addict
Looking great!
It's nice to see the tanks finished
It's nice to see the tanks finished
Looking great!
It's nice to see the tanks finished
The bettas could certainly be bullying these fish to death, the are known to be bullies towards other tank mates.
Some betta can live peacefully with other fish and some can't.
I'd suggest returning the bettas and seeing how the tank goes, if more fish die, then we can eliminate them as the cause.
There's nothing worse than a headache like this, I've had a breeding pair of honey gourami kill 6 tetra in one night -_-
Keep your head up!