i have a betta fish who's been lookin ill for some time, first he caught the ick which i cured, then velvet which i cured, and now under his mouth he's turned grey, his belly does look slightly big, dull in colour, (usually bright red, light shining on him in places purple), he lurks at the bottom of the tank sulking wants to eat but spits it out. tried giving him a treat of frozen blood worms. his tank is big cleaned regular never has dirty water, as nobody likes to live in filth. i was given medication which is ment to be a combination to treat anything but not my fish by the looks of things. any ideas whats wrong with him? guessing he'll be dead very soon.