I'm not talking about my own anacharis but my sister's. She has a 2.5 gallon tank with a filter and heater that has a betta in it. Maybe some members will pipe up saying bettas need a minimum of 5, but seriously, that fish is fine. We've had it for years In addition to the filter and heater, she has a small silk plant, a small (non sharp) plastic plant, two aquarium safe river rocks, a betta hammock, a suction cup thermometer, and some anacharis. She started out with three long strands of anacharis that was just floating around. I saw the fish nibble at the stem two or three times but never again. And don't worry, the fish gets fed plenty. I changed the water in its tank this morning and noticed there are only four or five very short pieces or anacharis on the top. Some still have some nice leaves and some are completely bare. What's wrong? My anacharis is doing really well with barely any lighting and no fertilizers. I doubt the fish is eating that much as bettas are carnivores. He gets four Aqueon pellets a day, so he's not starving to death. My sister's tank has no lighting and she isn't using ferts either. I think the plants can probably grow more leaves and grow the stems longer but is there anything we can do? Her tank has a light; the lightbulb just burned out. Should we get a new one? Thanks for any help and suggestions!!