I know this is entirely unrelated to parrots, but my little betta buddy Captain Shakespeare died of dropsy a few days ago and I am sad.

Where is Nathaniel when you need him, that wily little tetra??? I want to ask when I can add a new betta to my tank, as I have done a partial water-change and treated the water with Jungle Buddies anti-fungal tablets just in case the dropsy was parasitic or fungal-related. (I treated it when Captain Shakespeare presented symptoms, but by then it was too late.

)
Does anyone know a safe time-window? Humphrey the chinese algae eater is not displaying any signs of illness, but I treated him anyway and he is still in the tank. I am thinking of waiting a minimum of a month before I start the search for a baby betta, and am going to keep an eye on Humphrey to make sure he is OK... But just looking for anyone's input.
Thank you!