From the photos, I would have to guess that your fish did suffer from Ich. It also looks like it picked up some form of secondary infection, likely as result of a compromised resistances due to the Ich infection. It is still hard to tell in the photos for a positive ID, but from the indications, I would tend to agree with Pasfur in that it may be lymphocystis. Lymphocystis is identified as a white, wart like growth that occurs nearly always on the edges of the mouth and/or fins. Lymphocystis is not usually a life threatening condition, though it may reduce the fishes immunity to other ailments. Feed foods with garlic additives, or soaked in a garlic suppliment to boost the fishes immune system, and pay close attention to aquarium husbandry. Test your water and do any necessary water changes to keep your levels in check. If you dont see improvement in the fish's condition, you may well have another bacterial or fungal infection. you may need to seek a broad spectrum antibiotic coupled with a hyposalinity quarantine. Keep us posted on the progression and provide additional photos if you can get any of a high quality, up close.
Can you see any adverse behavioral changes in the fish as of yet?
Generally, Ich is ever present in the aquarium, and healthy fish are often unaffected by it's presence. When stressors are added, like poor water quality, new fish, new environment, or excess human hands in the water, the fish may become more susceptible to these parasites. Different fish are more susceptible to the ich parasite than others. Frequent water changes over the next few weeks will help reduce the parasites presence in the tank.
Originally Posted by Linda C.
My preferred method for treating Ich is Hypo-salinity (S.G. 1.009)
My hospital tanks are bare bottom (no substrate) with hiding spots for the fish. (pvc pipe/couplings, plastic tank decorations/caves.
Biological filtration (sponge filters/HOB)
Because of the increased demand for oxygen additional aeration is needed. I use air stones (powerhead pointed toward the surface work well also).
Make sure you test the water water parameters daily because pH, ammonia and nitrite levels can change and can cause stress on the fish.
Frequent water changes.
Soaking foods in vitamins and garlic help with the fishes immune system.
Keep and eye out for secondary infections. You might need to use antibiotics but don't use them unless you see something you feel the fish needs them for. It can lead to more stress on the fish is you just add them 'just in case'.