Hello all, we had a few good months and have gotten a few more fish and shrimp. All in another tank. We have had a betta( got her as a baby) from Petco, for 2 and a half months and out of nowhere she stopped moving. She won’t eat. She just lays on the bottom looking like she’s dead. I have tested the water for ph, ammonia, nitrates, nitrites, and it all came back within range. I also keep and eye on temp and it’s always between 75-80. Doesn’t seem like swim bladder. My daughter is heartbroken. Any ideas?