Test kit was purchased in April this year. Lot nuber indicates it was made July 2011, and they are good for 3 years, so the kit is fine...
Hoover seemed fine, although he was a little less active than usual,and maybe not eating as much as he normally did.
I tested the tap water, 0ppm. I did a large waterchange last night... brb...
*5 minutes later*
Its between 0.5ppm and 1ppm now... I'm leaning more towards the 1ppm...
Another water change later this afternoon me thinks...