Which Testing Kit should I get?

[Bergy]

nah, they are good.. snails that is..

the curly things andother things that are stuck to the glass are a form of worm.. damnit if i can remember the name... but Im sure lanny or greg will pipe up

[Just_Greg]

those little curly guys are Spirorbid fanworms.  if they bug you or get in the way, just scrape them off with an old creditcard or the equivalent.

here's a link to a collection of hitchhiker pix and ID's.  just match the pic to what you see:

http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml

[OCtrackiepacsg1]

Usually, I use the thermometer and just scratch the really big and annoying ones off.