Brock, on cryptosporidium, Flaygl can be effective against it if treated early.

With all parasites, cleanliness is the best defense.
Keep those water bowls clean! Wash don't just rinse them.
Aspen shavings clumped and newspaper bedding soiled with fecal matter needs to be removed asap.Gnats and fruit flys breed in the fecal matter.

Gnats / fruit flys can spread parasites from one enclosure to another.
To combat this I have a central light in the middle of the room with a timer that provides gentle light through the day.
I have fly tape looped next to the light that nails'em as the are drawn to the lamp.
I also have soda bottle bottoms with apple cider vinigar and a drop of dish soap. The ACV draws them in and the dish soap cuts the surface tension letting the gnats drown.
These two solutions have kept them in check for me.
Note regular vinigar works but apple cider vinigar works much better.
Mike.

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