Do not be fooled by their calmness.
They could be fine for days or weeks or even months; but things eventually will
go south if you don't separate your females, return some of them, and return your other fish as soon as possible. It is inevitable that you will have fighting and likely death on your hands in the future; you are not properly prepared or experienced enough to handle a betta sorority.
And like I said, on top of the fact that those barbs are aggressive and should be kept in groups....they and your Pleco will outgrow that 10 gallon quickly. You are also already quite over-stocked, plus adding that many fish at one time will cause quite an ammonia spike, which is harmful and deadly to your fish.
Please take another careful look at my other post.
Originally Posted by Anitax3x
okay now im scared, why do they say it is best to keep the betta females in groups of 4 or more then? I don't understand that. I'm returning the barbs and sucker fish right now. I actually do get a refund for them and can replace them with other fish. This is frustrating because I'm getting information from 03949240 different places and it all contradicts itself.
It is best to keep betta females in groups rather then just 2 or 3, as there is more risk of them going at and killing one another in smaller groups(larger groups=spread out aggression). This is called a Betta Sorority.
, putting females together, even in a properly-sized group, is always risky; all it takes is one or two really aggressive females or one that just decides she doesn't like the others for some reason one day and BAM, you have total chaos.
That is why Sororitys should only be attempted by more experienced keepers who have done a lot of prier research and are prepared to separate everyone if things don't work out....for even in perfect conditions, it still doesn't always work.
This was why I suggested you separate everyone ASAP. They may be doing okay now, but I would hate to see a post of yours in the near future about how all of a sudden your girls are fighting and things are going nuts in your tank. :/ That would be horrible for you, and all of us here who love bettas so dearly.
Like Micho said, It is always best to take the information a petstore employee gives you with a grain of salt. ALWAYS do your own research. This forum is a great place to do just that; there is a countless number of experienced fish and betta keepers here to give you accurate advice from years of experience and knowledge.
But Google can also be a wonderful tool; you just have to work a little more and read a lot to get a better idea of what is accurate ;)