Quote Originally Posted by chem geek View Post
It also likes shade so will hang out in light niches, under removable ladders, etc. which all need to be checked.
Nail on the head there, those are the spots I'm talking about. So, maybe even though it is totally in check while keeping my water at good levels, I need to shock the heck out of it for a while to kill it off completely. Ben is probably right too, it's still living in places that I don't expect it, and will expose itself if I slip up.

Thanks!