take out the bettas, LOL
I'd take the bettas out or use 2 nets to lure them away from one net and straight into another, it's how I caught my mother in laws super fast and crafty molly.Bettas are highly aggressive fish. << Not all the time! My Kyon can be a bit grumpy but most of the time he's an angel! They don't do well with brightly colored, long finned, or nippy fish. Male Bettas should NEVER be kept with other Bettas unless you trying to breed a male and female. There are some Bettas that do well with other fish but it really isn't worth the risk. << aslong as you have a spare tank or somewhere to house a betta if he or she gets too aggressive then it is worth the risk. The first month is really the tell tale time to see if your betta is compatable. Female Bettas are genraly okay with other fish but you should just take the Bettas out if they are eatting your tetras.