Hey all! Just thought I'd share what a few weeks in a healthy environment can do to a betta. This guy is no longer with me (I have learned my lesson), but I wanted to share anyway
I originally wanted to get a really pretty betta, but when I saw him I knew that I had to get him..especially because he was the only betta I had ever seen that watched me everywhere I went...he always was looking at me head on from his cup..And he didn't try to flare like the others, he kind of just sat there in his tiny little cup like he knew he wasn't pretty. His body was like a pale yellowish color (not a good color) and his fins were almost gray and a little ragged...But I got him anyway..A giant (king) betta in the same cup as the smaller bettas with very little water. He could barely move.
Anyway, I took him home and after I acclimatized him, I went to go let him out into his new home (5.5 gallon with sand substrate, all live plants with driftwood) and before he swam out of his cup, he tilted his head up to look at me (because my head was over the tank) and I nodded at him...
then he swam out...This was him about a day or two after being in his new tank...so by then his colors and fins had improved a little, but he still was very homely looking...
He improved very quickly over the next few weeks. He had one little spot in between all the plants on the driftwood that he would sit...like this one little gap where no plants were (very small) and he would just sit there looking straight out of the tank. Whenever someone came up to the tank, he would dart out, swim right up to the front, and just stare at them head on, never flaring. Every Saturday I would give him a water change and feed him live food (bloodworms/brine shrimp) and he would build me a HUGE bubblenest the next morning. Like it wrapped around the front and side of the tank and came out from the wall about 1.5-2 inches. And whenever I lifted up the lid and put my head over the tank, he would start doing little jumps out of the water like he was excited
He was a
very calm betta, but whenever I looked at my sister's betta in the tank right to the right of his, he would swim all the way over to the right of his tank and spaz out to get my attention..Of course once I started looking at him again he would immediately calm down and just stare at me head on again..
Anyway, this is what he started looking like after just a few weeks in a healthy and happy environment: (this was the only time I ever got him to flare...I had to hold a mirror up to get these pictures

)
This was his tank: (ignore the toothbrush, I was using it for cleaning the tanks that day)
So his colors improved a lot, his fins grew and healed very quickly, and he developed the cutest character...And a white beard on his face

He also had a couple red/pink/blue scales on his body..just randomly..
He will be missed, but I was able to rescue another king and put him into Kroll's old tank. So now there are two happy bettas.
Thanks for reading everyone! Just thought I'd share!