Just thought I'd mention that my daughter's male betta, Harvey passed away at the ripe old age of 3 years. He came to us as a rescue from a small cup on a shelf at petsmart. He had extensive fin rot and was pitiful. My daughter, Kayla, immediately started treatment and he responded quickly with the meds and clean, filtered and heated water all held in a 5 gallon tank. He grew, and his fins recovered magnificently. He was always alert, and assertive, fluffing up whenever anyone came near. A year later, he came down with Ick, and again, with quick treatment from my daughter, he rallied again and fully recovered.
He is buried now, with his favorite little sleeping castle buried next to him. She felt it was important that it stayed with him.
RIP Harvey. You were a survivor and proud, and always beautiful.