Hartz Ultra Guard Eat Mite Treatment for Cats Contains Aloe .Hartz Ultra Guard Ear Mite Treatment For Cats. Contains aloe to help soothe irritated skin. Kills ear mites on contact. Net contents: 3 tubes 3 cc s 0.101 fl oz each; 9cc 0.303 fl oz total. Hartz Ultra Guard ear mite treatment for cats offers relief for cats suffering from ear mites. Cats that have ear mites will typically shake their heads and scratch their ears frequently. Ear mites live in the ear canal of the animal and cause a brownish waxy debris to be formed. Ear mites may be detected by placing some of the waxy debris on a dark surface and carefully watching for the movement of tiny white specks away from the debris. Inflamed watery or blocked ear canals indicate a more serious condition which requires the services of a veterinarian.