Originally Posted by Byron
It can depend upon the specific Betta, but generally speaking I wold not try this. The delicate (and they are very delicate fish) Scarlet Badis will likely get eaten. I've had a group of these for a couple years and they are no longer than half an inch. A 10g will work, my three (I'm down to 3) are in a 10g, thickly planted, as the males do spar.
Male Betta really are not community fish, and deserve their own tank. The otos should be OK, though that is not always a certainty depending upon the Betta. I have heard that they will eat shrimp, but that may depend upon the shrimp species of which I know next to nothing.
I have already gotten two as I had heard from other sources that it should work. My betta has shown limited interest but i made sure to provide areas they could get to that he couldn't when they wanted to rest. They seem to be considerably faster then my CT betta, and my betta doesn't seem to be particularly aggressive as therer is a Ghost shrimp thats been in the tank for a few weeks (was trying to test my betta's aggression) and it has been fine.
I'm adding more plants to my 10 gallon as I go so it isn't to densly planted now but ill be upping it more and more, also getting some pennywort for it this week.
Sorry for poor picture quality, took with my phone.
What the tank looks like right now,
The Brighter of the two,
The Duller (yet bigger) of the two
I'm not sure if they were eating at the lps or not, as their stomach seem to be sunken in, I got them before i wanted to as they seemed to be the only ones left. Didn't seem sick as they were swimming around fine so i nabbed the last two. Didnt see the stomachs till i got home though. :/ Fed them some brine shrimp today, not sure if they ate it or not as i had to rush out of the house. (the pics were taken yesterday)
Any advice on making sure i can get them to eat? they are super cool and i can already see the personality in them. Also i have yet to see them fight, maybe its adjusting to a new tank or something but they seem to swim together a lot.