I bought a betta fish a few days ago and was advised by a pet store employee to get pellets for it to eat (this is a local store with a large aquarium section and all the employees have knowledge about aquariums). So I bought the pellets. I set up the betta in its living space (2.5 gallon tank, a couple of live plants and some gravel; water treated with that stuff that removed chlorine and chloramine).
For a few days, I fed it individual pellets. It seemed to eat three or four pellets at a time, one or two times per day, and to know when it was done eating. This morning, however, was different. I could not get it to eat the pellets; it would sometimes put one in its mouth, and then spit it out instead of swallowing. I tried to get it to eat for twenty or thirty minutes, and then I gave it some time to rest before I tried again. When I came back, it still wouldn't eat the pellets, so I tried some freeze dried meal worms and small pieces of my goldfish's flakes with the same result.
Later on, I went back to the original store and bought the following: frozen, fresh brine shrimp; betta flakes; a little container with different freeze dried creatures that was labeled as 'betta treats".
The betta fish did not like the treats or the flakes. I tried to give it brine shrimp, but it showed absolutely no interest. I did not want to get a bunch of brine shrimp in the water because I did not want bacteria to grow, so I put the fish in a quart sized yogurt container with some water and then put in a lot of thawed out brine shrimp, which it showed no interest in. I put it back in its tank.
I can kind of understand its not liking the other stuff, but was surprised that the thawed out brine shrimp elicited no response.
I would be very grateful for any advice :)