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I personally think it’s a bad idea but hey, do what you want"So when it comes to adding tank mates with your betta, mollies are a great choice. Some of the main things to remember when adding mollies and bettas together are: ... Mollies can grow up to 3 inches which is larger than bettas. Because of this, it's not recommended to put them in tanks smaller than 20 gallons."
https://www.bettacarefishguide.com/can-bettas-and-mollies-live-together/#:~:text=So when it comes to,mollies and bettas together are:&text=Mollies can grow up to,tanks smaller than 20 gallons.
the tank is 20 gals.
I'm confused
