54L tank, with two wood and one amano shrimp. Was considering one male potentially although just considering options at the moment!
I might be able to helpOR... you could get a nice little 5 or 10 gallon setup and Then get a betta
Maybe someone here with more stocking experience could chime in... but I think your tank is pretty full already... I believe it is recommended for both mollies and cardinals to be in a larger tank than what they're in now
Anyone?
I might be able to help
OP, the mollies really ned 29+ gallons because of their large bioload, and the cardinals need 20+ gallons because of their activity. So why not rehome everyone else and get a betta You can also divide the tank and get 2-3 bettas.