<p>It really does depend on the college. Mine (UCSC) allows “anything that would die if not submerged in water.” Maximum tank size allowed is 10 gallons. I have a male betta in a 3 gallon tank.</p>
<p>Remember that you will need to figure out how to bring your fish home over long breaks otherwise you risk killing your fish from a dirty tank (especially if you don’t have a filter) or starvation among other possibilities. I live close enough that I can just pack up my little guy in a small travel tank and bring his tank home with as little stress to him as possible. There are those multi-day feeders, but I’ve never had good luck with them. Either the fish ignore them or they don’t dissolve over time like they should. It’s generally not a problem to leave a betta for a few days, but I wouldn’t leave them any longer than that without food and regular tank cleanings</p>
<p>Not my place to judge, but you really should get a second tank for one of those female bettas. Even females are known to be aggressive towards each other and it can be highly stressful to them if they can see each other through the divider. Plus that tank barely sounds big enough for even one betta let alone two. I feel bad enough with my little guy when he flares and attacks his own reflection :(</p>