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So, after the 5 gallon post, I'd like to upgrade to 10 gallons to house a Betta and some Cardinal tetras. Would it be possible?
Ok thanks!I think cardinals would still require a larger tank than that which offers them more room. You could keep a smaller species of tetra like ember tetras instead in a 10 gallon.
Could I add lambchop rasboras instead with the Betta? Maybe in a 15 gallon?Its probably what you like more. If you really like bettas and are fine with only having 1 in the tank then get a betta. But if you want multiple fish in the tank then go for ember tetras or you can also do guppies.
I've read they don't get huge in size like 2.5 cm maxCould I add lambchop rasboras instead with the Betta? Maybe in a 15 gallon?
Yes because the betta, if it doesn’t work out can kill or be killed. Even if it just chases the fish around and around it stresses that fish out and can end up with the fish having a shorter lifespan.One thing I urge you to consider, what will happen if the betta does not tolerate tank mates? Do you have a back up plan for him? Usually the back up plan involves a second tank so do you have the time/resources to set up an additional tank if it does not work out?