Adding beta's in the future

[sakurahime]

I am working on upgrading my moms tank to a hundred gallon to give her beloved pleco some more room. When I do this I get her current 50 gallon tank to replace my well planted 20 gal. I was curious about adding a couple betta's when i do this.
My current fish are 5 black mollies, 3 cherry barbs, 3 serpae's, 2 pristella's and 2 neon tetra's. would this become a death tank shortley after creation?

[JKfish]

You'd need at least 5 of each tetra type, so they can school. In a fifty gallon tank, if you wanted to have a betta, you'd probably want to go with only one male, or a small sorority of females. http://www.aqadvisor.com/AqAdvisor.php that is a way to approximently measure how many fish you can have.

[creamcookie]

I wouldn't put barbs or mollies with bettas because they are fin nippers and may bother bettas. Sometimes neon tetras nip fins too.

[sakurahime]

Drat,
Well thank you for the advice. At least now I won't be torturing a poor betta fish to find out if he is compatible.

I will probably come back and revisit this down the line and build a tank for the betta's primarily.