Its on the side of his mouth. He look fine yesterday and looks happy enough, is eating and not looking stressed.
Tank size: 48l
pH: 7
ammonia: 0
nitrite: 0
nitrate: 20
tank temp: 26
Fish Symptoms (include full description including lesion, color, location, fish behavior): look like a white pussy zit, with little bit of red soreness on one side of it, it is on the side of his mouth. Otherwise he is behaving normally, eating, swimming around etc
Volume and Frequency of water changes: 20% once a week
Chemical Additives or Media in your tank: Just stresscoat when doing water change. Added extra for this mornings water change to help healing.
Tank inhabitants: 4 platy, pr Gourami (inc him), 5 pygmy cory
Sorry camera not working at present.
Any ideas/suggestions. Please help