My vet will microchip a pet for $50, can't imagine that environment is any less hospitable than inside a tank pleat. . . doesn't provide active tracking, but it would ID your tank if ever recovered (i.e., if you saw one suspiciously like it listed on eBay...).

OTOH, you could probably add a rider to homeowner's policy for less than that. Of course, that doesn't consider the rate increase/refusal to renew if you ever did actually file a claim.

Wonder what Hamish's homeowner's (excuse me, manor owner's) insurance looks like?

/threadjack