I had four betta splendens (siamese fighter fish) in my aquarium.
A male and three females, the boy fish was in his element and seemed to adore the three females, always trying to attract them with one of his little bubble nests (to which they all used to respond to).
Yesterday i found that he'd lost all his colour from his fins and body.
Tonight i found one of the females in the same condition.
i transferred them to seperate tanks to try to treat them and sadly within the past three hours they both have died.