Last night i noticed a split in my bettas tail (pictures 3 and 4), since I first got him I have been wondering if the paler edges and dark border on the caudal fin (pictures 1 and 2) was natural coloration or fin rot Now with the split I'm even more worried, is it fin rot or could he have just torn it? He's in a 5.5 gallon with the filter as low as it can go, he has been swimming and eating normally and I just did a water change yesterday












