Silver Dollar Skin Peeling

Tank size: 55 US gallon
pH:N/A
ammonia:N/A
nitrite:N/A
nitrate:N/A
kH:N/A
gH:N/A
tank temp:78F

Fish Symptoms: Skin on sides seems to be peeling, dark color along the back fins, been dwelling at bottom of the tank for the past day

Volume and Frequency of water changes: Recently set up tank

Chemical Additives or Media in your tank: Water conditioner Chlorine and Ammonia, Bio Treatment, Carbon Filters

Tank inhabitants: 4 silver dollars

Recent additions to your tank (living or decoration): Newly Added Large Stone, no living plants

Exposure to chemicals: None I beleive

How recently set up? Is your tank cycled?
were gonna need the basic water parameters, Ammonia, Nitrite, Nitrate and PH at least.

How long has his skin looked liked this?
I'm no expert but I would try and keep your water quality as best you can and definatly use some melafix in this situation. It Should for sure help with the peeling and repair the slime coat aswell as help repair his damaged fins(if I observed that picture correctly).

By "Bio Treatment" did you mean you added some type of Bacteria in a bottle kind of thing to jump start your filter? These are generally not very reliable, and should defenetly not be your only source of beneficial bacteria.