betta fin

Then, today I perceived a small hole on my lovely betta's dorsal fin, as you can see below: This is the setup: • Size: 15.74" length x 11.81" height x 9.84" width, 7.29 gallons; • Substrate: 11.02 lbs gravel nº 0 (Aqua Pedras); • Heating: Roxin® HT-1300/Q3 50 W, adjusted to 26 ºC; •...