About the red mites:Mites/Lice. My mother-in-law had her home infested with bird mites after some nested in her attic. So yeah, I'm a bit paranoid. The chickens do get monthly health checks, but that's little reassure to someone like myself. Current brooder is a watertight stock tank filled with chicken sand. Is there something better I should be using? Should I grease the sides (joking)? Should I swap to a bedding that can be more easily changed out? The sand is almost zero dust and very easy to clean... and it was an investment. I'd like to keep using it, but could be convinced to switch.
Sand instead of bedding in summer is a good beginning.
Checking 2x a week during the warm period with corrugated (white) paper rolls under the roost bars and in the nestboxes is another thing you can do to prevent an unexpected outbreak.
I do a lot more and use diatomaceous earth (in sandbath, as paint) to prevent them to multiply an prevent an outbreak too. I wrote an article about how I concurred the red mites 3 years ago is in my personal thread June/July 2023.

