Test Results for the Following:
Ammonia Level? 0
Nitrite Level? 0
Nitrate level? testkit expired, normally between 0 and 5
Ph Level, (If possible,KH and GH and chloramines)? 7.8
Ph Level out of the Tap? 7.8
Tank size (How many Gals) and How long has it been running? 13 gallon tub, a couple of days
What is the name and size of the filter/s? penn-plax cascade 100
How often do you change the water and how much? havent changed any yet, but going to today (30-50% twice a week)
How many fish in the tank and their size? 1 orange common, 2-3 inches
What kind of water additives or conditioners? prime, seachem stability
Any medications added to the tank? parasite clear
Add any new fish to the tank? he's the new fish
What do you feed your fish? lots of stuff
Any unusual findings on the fish such as "grains of salt",
bloody streaks, frayed fins or fungus?
Any unusual behavior like staying
at the bottom, not eating, ect..?

I was just windering if the ammonia burn is just healing from before, theres no mmonia in the tub

Well, as my current frustration with my poor pearlscale that has incurred an apparent raging internal bacterial infection will witness, I’m no expert, but I’m doing my damndest to learn, but I do hate it when you’re desperate for a response and/or help and/or just plain ol’ support, understanding and sympathy and no one responds, it can make you feel bad, so I just thought I’d take a minute to say I sympathize with you and as far as my understanding of ammonia burn goes, if it’s a blackish area, then that is, in essence, a scab and is healing. And, if it is black and healing and if you have only had the fish for two days and your water tests good, my first assumption would be that it was from the store.

My betting is it is healing ammonia burns. Healing burns can appear some time after purchase from a store. Its nothing to worry about as they are in good water conditions now. Many stores overstock there tanks as Google my latest addition has a ammonia burn healing on his tail which appeared few days after purchase.

I agree. I think it was from his past conditions. However, just keep a check on water params to make sure they stay okay.

I thought so too, just wanted to be sure. His tank defianently was overstocked and filthy, with lots of dead and sick fish