|(Sorry it's sideways for the first 0:25. I just uploaded this vid real quick from my phone for my Mom to see ;)
Aquaview 360 - 3 gallon aquarium with 1 male veil-tale betta and two female platies. They had a hard time getting acquainted at first. Angelo (the betta) kept chasing them around and pretending to "nip" at them, but not really doing anything to them. (Don't worry, I was close by with a net having a heart attack, and ready to scoop him out the moment he tried anything! lol) Once they were together for about 15 mins, they were all swimming together like family.
The tank is equipped with a 10W 2-5 gallon mini-heater that turns off when the water reaches a comfortable 78-79 degrees, and an external thermometer.
Update: Angelo did not seem to be "enjoying" his company overall, and was rather just "tolerating" it depending on how he felt. I couldn't relax knowing that he could get pissed and flip out on them at any moment, so I decided to just get him his own 2-gallon AV360 for my desk at work. (I originally had him at work in a 1.5 gallon bowl, at room temperature, but the office started getting too cold (below 70!) so I had to bring him home. Now there is a mini-heater in his new 360, so he'll be fine. (I, of course, will still freeze to death.) I put a female betta in with the 2 platies at home, but she got ammonia poisoning in less than 24 hours, so I think even 3 tiny fish was too crowded for this tank. I put her in the 1.5 gallon bowl and she's about 1/3 the size of Angelo, so she loves having it all to her herself. I also added a Tetra Whisper 3i in-tank filter for the platies, and they couldn't be happier with this 3-gallon all to themselves. Angelo's glad to be back at work w/me, and that things are back to normal (besides his new decked out crib, with silk plants that are more gentle on his fins ;)