I've had my betta (Admiral Ackbar) since roughly October (not exactly sure, but around then). I actually bought him because my mom bought a bowl she liked for HER betta, but decided she preferred her biOrb because it was filtered, so I got the bowl. Unfortunately, I learned the hard way (rather, Admiral learned the hard way, I suppose) that it was much too small for a betta (I'd estimate between 0.5-1 gallon). His fins turned black on the tips, and from what I've read, I believe it to be from ammonia poisoning. I increased the water changes to 100% roughly every other day, and got a 10 gallon tank for Christmas. In the 10 gallon tank, he shared his home with a BN pleco and a pictus catfish. Unfortunately, this was all before I discovered this website, and I didn't realize I was severely overstocking the tank, and that pictus cats like to be in groups. At first, Admiral was a bit aggressive to the pictus cat, but then the catfish became a bit nippy at his fins, and he kept them neatly trimmed. Needless to say, he took a trip back to the pet store. He stayed in there for about two months, until I set up a 55 gallon tank last weekend. That weekend, I also bought the API Master Test Kit, and tested the water in the 10 gallon. This was a week after I did the last water change, and I change the water (roughly 40%) every weekend, so it was the maximum time that the water is in the tank (if that makes any sense). Anyway, the readings were all zeros, which was surprising (in a good way). I moved him to the 55 gallon tank last Saturday night. He's having a blast swimming around (just him and our BN pleco). Tonight I took a closer look at his fins, and they look a lot different. Rather than being blunt at the ends and even, from the pictus I presume, they're thin and pointy again. Also, there are no black spots, and the tips are translucent. Does this mean his fins are regrowing? The current parameters for the water in the 55 gallon tank (as of this morning) are 0 for nitrates/nitrites, and between 0 and 0.25 for ammonia. (As an aside, we're not cycling the tank with just the fish. I moved the whole filter, not just the media, over from the 10 gallon tank, in addition to the filter for the 55 gallon.) If it is that they are regrowing, can I expect the color to come back? If so, roughly how long?