Hello. My red betta is a male named Maya. I made him female.. Anyway, he's about 2 years old and was switched from a 2 gallon bowl to a 10 gallon aquarium. Its got a filter and a floating thermometer around 78 degrees. Conditioned the water. It has 5 pounds gravel, a big white shell ornament, and a medium fake plant. I know it should have more gravel and accessories. I was wondering what would be the most ideal? I am also planning on getting him some friends. Neon tetras and maybe others. In his bowl, he seemed lethargic and staying at the bottom. He had trouble swimming up, like it would take mini bursts and he'd lay on his side at the bottom. I thought this could be a swim bladder illness. I tried feeding him a pea but he won't take it. Now, he swims up fine and doesn't stay on his side. But, still won't eat his pellets. He hides behind the shell and swims up every once in a while. I conditioned the water and a light filter is running. Could he be scared of the change of size? Is this how betta fish get when they're older? Should I get a stress reliever liquid? Also I heard about water cycling. I'm not very experienced. I set up the tank and had it run for a whole day. Put him in the next. Is that bad? How do I test the water ph, levels of ammonia, nitrates, etc? What sort of thing should I be looking for to ensure the proper care of my betta fish and his environment, aswell as future friends?