needs live plants.
LOL bettas are carnivores. yes, it is for decor. you'll be amazed how much nicer it looks with the moss in there. remove that "no fishing" sign and replace it with a piece of driftwood with some anubias nana or lace java fern and viola! you've got a lovely planted tank.Hmmmmmm I don't know too much about live plants is the Java moss just for decoration or does the betta eat it? The tank is only 3 gallons so I want to leave him room to swim.