cam

I really would like to put these in my smaller tank...could 2 of these survive in a 2.5 gallon aquarium

Butterfly

Cam I'm really sorry but 2.5 gallons is not enough room for danios. They are a really hyper fish that need lots of swimming room and several of their own kind to swim with.
carol

Cody

that would be overstocked...it could work but i think it would go down hill and i mean money might be a reason or space...but really even just a 5.5 or 10 would be worth the investment if you really got into this ...you would want a bigger tank the best part about fish keeping is exploring your options...its not a hobby its a passion