Hey guys, I have mentioned this in other posts but I am really stumped....I have a baby boy betta I bought from Petco last month. This is my third baby betta, the other two seem to be flourishing and doing really well (I have had them for 2-3 months). Anyhow with those fish I noticed them growing pretty quickly. My newest baby, he seems a little longer but super skinny. He has a little bump at the end of his body right before his tail. It is like a bump in his shape not like a lesion or something attached to him. I wonder if he has some kind of defect, he barely opens his tail. He eats and he's surviving but he doesn't seem to be thriving. I have him in just under a two gallon with 50% water changes every two days or so. I thought maybe moving him to a large tank 5.5 would help but that made issues worse. He seemed really tired, lays on the ground a lot ... everyday I expect to find him dead but he keeps trudging on. I feel bad and am wondering what else I could do to help him thrive. I keep the water at about 80 degrees. I moved him back into the small tank, he seems more comfortable there.