new betta set up
Hi i've just purchased two new bettas (my first) and have upgraded the more paranoid (and hyperactive) looking one to a larger tank.. around 3.5 gallons.... It has a heater but not yet a filter. Is it worth getting a filter? Can I put it in once the fish is already in there?
My other betta will be getting a bigger tank in a few days but still seems happy in his jar, blowing bubble nests and feeding well. Also, can my betta's live happily off dried blood worms alone? Thanks for your advice!