ulcers/feeding

hi 2 of my gold fish had an ulcer. i treated them last summer for ages i just checked them now and they still have somet. on there side just one round thing looks black i cant treat them now its winter. is this still ulcers and wot is the best stuff to use ready when sping comes and when should i start treatment agien and feeding them
tony

ill make it easier how long does it take to heal

Your water quality needs to be improved and you wouldn't have ulcers.
Understand aeromonas, pseudomonas pathogenic bacteria
http://www.practical-water-gardens.c...article003.htm
This product may help your fish
Microbe-Lift Sabbactisun
A unique, herbal, immune-enhancing stimulant which reduces bacterial and fungal infections in fish with bacterial dropsy, fungus, milky skin, raised scales, fin/tail/mouth rot, bulging eyes, and ulcers. Helps to drive pathogenic bacteria off of fish. Stimulates and accelerates regeneration of damaged tissue until no trace of
the wound remains. Safe for all pond life in and around it. 16 oz. treats 240 gallons for 10 days.
http://www.koivillage.com/medications/microbe_lift.html
This product would help your pond.
KoiZyme
http://www.koicarekennel.com/About-Koizyme-c-2.html

thanks for replying the pond they got ulcers in was a small pond i have built them a mutch bigger pond since and the water is perfect in this one as i also got the green genuie filter the new pond has been running since october now ill try that stuff u said thanks
tony