I know that dropsy isn't a disease by itself, but rather a symptom of other problems, hence the awkward title.
Anyways, it's finally time for me to get a new betta n_n I plan on using the same tank, heater, and thermometer...but giving the rest of the tank a "makeover", so none of the gravel, plants, etc. will be in there again.
Is there any specific way you should clean a tank after dropsy? I know its contagious which is why I'm asking. I Google'd it and found everything from "with frequent water changes you should be fine" to disinfecting the tank as best as you can.