Hello I have a 4 year old Pacman and a 3 year old ornate, in different tanks. They are both very healthy.

I use zoo med eco earth substrate.

Lately I noticed in both enclosures a ton of very tiny white bugs, I think soil mites? I am not sure, they are extremely small, smaller than a pin head. I see them crawling everywhere and they crawl all over the frogs too.

What are these things?

Are they dangerous to my frogs? And why do they keep coming back? I clean the enclosure completely and remove all the substrate and replace it, disinfect the surfaces, then they are back again???

I am worried for my frogs