I got a betta for my 2 gallon tank yesterday. I do not have a filter or heater, but the water remains 21 degrees (70-71 farenheight) . I am feeding her Freeze-Dried Bloodworms (Red Mosquito Larva) which I thought they loved but she just takes it in and spits it out. She does it with lots of the pieces. I didn't buy anything else as I was sure he would he eat it. Is there anything else she might eat?