Fair Fish-scales missing

Hello! My little brother brought home 2 koi looking gold fish from the fair last night. Right now they are in a little fish bowl, that I use to keep my betta when I do a 100% water transfer.
I am going to go out and get them a 20 gal tank, filter air stone etc later today.
My question is that both of the fish have some scales missing, the white and orange one has several missing in the shape of a triangle and the orange one is missing a few here and there. According to my brother the guy was grabbing the fiah out of the tank with his hands.
They are also just sitting at the bottom of the bowl.

I am gonna get some stress coat, but is there anything I can put with them to ward off any infections due to the missing scales?

 

More importantly, they need a pond with hundreds of gallons.

 

That is not an option, but thank you. Pretty sure they are feeder goldfish not actual koi fish.

 

Feeder goldfish, comet goldfish, common goldfish. They all get pretty large (8+ inches), way too big for a 20 gal. Putting fish in aquariums too small for them can cause them to have stunted growth, resulting in short and sickly lives Goldfish have a high bioload too, and your 20 gal will get very dirty very fast.

It might be best for you to rehome these goldfish, either to your LFS or someone with a large pond, and stock your 20 gal with more appropriately sized fish.

 

I was reading that the guidelines are 30 gal for the first fish and then 10 more for each additinal fish. Is that not ok?

What about the scales...

 

It depends on the type of goldfish. Some don't get as large, and don't need as large of a tank. Your 20 gal tank plan doesn't fit that rule either though...

The missing scales are possibly from injuries, especially if all of the goldfish were kept together. Clean water and a large tank will help them heal.

Do you know about the nitrogen cycle? You should cycle your tank to protect your fish.

 

Just thought I'd toss out that the Petco buck a gallon sale might still be going on. A 55 gallon tank might not be out of the question.