My water is discolored after a few days

That's true, good point.

Boon Docker wrote:
The bacteria should be able to grow from the air in the holding tank and collect on the inside of the water lines.

Maybe, but is only using the city water inlet tho.

The bacteria should be able to grow from the air in the holding tank and collect on the inside of the water lines.

Serratia bacteria is airborne and won't be from a 600' deep well. Instead of guessing, I'd take a sample to a water quality lab for testing. When you pick up a sample bottle, take to a tech to see if there is anything you need to know before taking a sample in. Then when you know exactly what it is you'll know exactly what to do, if anything.

I'm not sure if this is your problem, but I had a similar situation this year. At the beginning of every trip I would notice that the water would come out of the faucet pink for the first few seconds. After that it would run clear for the rest of the trip. It consistently did this for 3 trips. I thought I had flushed out all of the antifreeze. Thinking back I realized I missed the outside shower and outside kitchen. For some reason only small amounts of the antifreeze would enter the line upon the initial connection. Just enough to give the water a pink tinge. After I flushed the outside kitchen and shower, the color went away.

You are saying that the water does not look pink from the outside faucet. If so then there is either no iron bacteria in the well water or there is water condition equipment in place.
Are you connected to the well or through a house water line?

IRon in the water makes the best sense. I haven't had my water tested, but there is iron ore in our region. There used to be a major steel mill about 15 miles away and ore mines 10 miles away. I've seen rust in baths and sinks all over the area. I'll get it tested and figure out how to sanitize the lines as an additional precaution.
Thanks for the help.

If the water is pink it is more than likely Serratia bacteria coating the water lines in the trailer. If the water is reddish brown it is iron bacteria.

Sanitizing the water lines in the trailer will help if it is Serratia bacteria, but not if it is Iron bacteria.

To keep iron bacteria in check the well needs to be shocked.

Flush the system and sanitize.

It looks like DutchmenSport has the explanation.

The water in my house (on a well, 35 feet deep) does somewhat the same thing, only much quicker. When it first come out of the faucet, it looks clear. But let it sit for 10 minutes and it turns red-brown. Kind of icky looking, and to think we drink this. But the water has always tested good, no bacteria or anything like that.

The problem is, it's the minerals in the water itself (which actually are good for you). In our case, the red (and I can imagine the pink for you, which is a light shade of red) is iron in the water. The stronger the iron content,the redder the water will turn, until it reaches a saturation point and it turn brown. If the water sits, it will begin to form rust stains (or iron stains) in your sink, bathtub, toilet, wherever.

Your water is sitting in the lines in your camper when you are gone, just like in our bathtub, it's not moving. It turns a reddish color. You start running the water and it flushes out and begins to appear to be clear again.

If you were to catch a glass of water and let it sit, I bet it will turn reddish-pink on you too.

There's nothing wrong with your camper, it's not pink antifreeze, it's the actual water.

Our rust in the water problem was solved when we ended up getting a whole house filtration system (Kenetico), which runs the water through a sand filter and removes the minerals from the water. It runs on no electricity, back washes itself and even has a water softener ... no electricity at all. Except in very rare occasions, this took care of the rust and the red-brown occurring when water sat (in a glass or in a bathtub, or in the bowl of the toilet).

So, to test it out, get a glass of clear water and let it sit. See if it turns red. If it does, there's nothing you can do except filter your water.