Yo' Billy, it works in fish tanks too!!!!
It was the profile showing the green/white, and packaged in the same tube that tipped me off.
Four tubes for $20, not a bad deal. Cool thing really, I use this to nail the frags down after they get big and superglue won't cut it. There has been plenty of times I would need a tube and everyone would be out.
If you have noticed, Walgreens and Rite Aid stores have a little "As seen on TV" endcap, that would be another source if needed.