I'm a novice so why am I pushing my limits with my catfish?? And why is it not fair to the beta -tell me more!!
I believe they will get too big for the size of your tank which is under 10 gallons.
Not to mention the current factor...as others have explained.
Also the beta, as Byron explained beautifully is a solitary fish and doesn't like being with others. Even if you get a timid one and he choses not to murder the others ....his presence will stress out the other fish and visa versa.
That leads to unhealthy fish that simply will not live as long as they should.
I know there are people that have done this and they are (hopefully) very experienced and have larger tanks with heavy coverage where the fish can hide and feel safe.
Sadly we can't really ask anything from the pet shops as they just want to sell things.
Also most employees are kids that just don't know (or adults that don't either).
Always come here or another forum or just google.
I don't really know what I'm doing that's why I'm asking advice from the pet shop and other people like on here
And kudos to you for taking the steps to do right by your fish!
*****Also, we need to know what your water parameters are so we know what fish will and won't work for you.
PH, GH, KH, ammonia, chlorine, nitrate, nitrite*****
....oh and yes, take those sucker fish back!