Quote Originally Posted by erom2 View Post
(Sorry to double post, but it looks like I can't edit my posts for some reason)

Okay, he left the water bowl, and I saw little black particles at the bottom (the biggest were perhaps 1 millimeter in diameter). I took a picture, sorry for the quality but it's not easy since they're so small. Also, I change the water everyday and since I use paper towels, these can't be substrate or just dust.

http://uppix.net/b/e/9/2589136f0f451...231d01ef5c.jpg

Do you think these could be mites after all? (I of course made a deep cleaning of the tank and everything in it, don't know if this will be enough though)

Again, thank you for your help!
Omigosh...I'm no expert but it sure looks like some kind of little identically shaped bugs to me.

I see legs on them.

Whatever they are, they can't be good.