I've read mixed reviews about this:
http://www.petmountain.com/product/a...nia-alert.html
A just bought one for my 10 gallon. A lot of people of course said it works great, and some have said it didn't work. I am, of course, using it in conjunction with my ammonia test kit anyway, but I wanted something to let me know if I need to check sooner than I normally would. Since it's a nano, I know the tank can crash fast if you don't act immediately.
Does anyone here have anything to comment about that product? Just curious how everyone here has done with it.