Sounds like you are a lucky one if your mucus is manageable morning and nigh. Mine is almost all day and about three tablespoons each time. I have found that dairy products make it worse and more active, so I try to not eat dairy when I know I have to go out into public places like doctors and grocery stores.
I don't know what a loop colostomy is or what it looks like, I think I will look it up. I have a colostomy sense 4-2017. I didn't get the mucus right away it was about four years before I had it. Seems strange to me that it was that long and now so much output, but I don't understand the whole anatomy thing and how it works. So it is live and learn everyday.
I hope your stays controllable and that you don't get the same problems I have, each of us are living with different outcomes.
have a blessed day