AquariumPage
Aquarium Advice Regular
Honest opinion... No.
The 2.5 might be ok for the Betta but it too really needs a ten gallon, five at the smallest. You are probably going to need to do daily PWCs until you have a bigger tank. If you can somehow get some more media in the filter it will help as there will be more space for your BB to colonize, even a sponge over the intake will help. Of course, that would depend on what kind of filter you have.
i have a sponge over the intake to help. I have one of this mini bow aquarium desktop 2.5 ... I am not able to add any more filter material unfortunately. hopefully I can find a cheap tank set up eventually that is bigger for my betta. where I am living at college, I am not allowed to have anything larger than a 10 gallon aquarium.