Thanks for the feedback, everyone!
I liked the idea of the mini petsmart brand so I went ahead and bought it on clearance this afternoon. I used it to drain a 6 gallon tank that I'm trying to fix and it worked quite well if a little slowly. I think the Marina siphon I bought will do the job quicker on the 6 gallon, but this mini-one should be pretty fabu for getting into the corners of the Hex.
Originally Posted by Lion Mom
If you find the tube is too long for your tank, you can always cut it down. :)
Never thought of that. Fabulous idea. I'll do that for sure if I find it's too big.
Thanks again for putting up with my newbishnessness