canals have negligible water flow (except during disasters!) so I don't think that'd work very well. They also get dredged occasionally so there's a decent chance anything you leave down there won't last more than a couple of years

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DonHopkins an hour ago | parent | next [-]

> They also get dredged occasionally

And it's fascinating to watch!

https://www.youtube.com/watch?v=aGFC6MF5-_k

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fragmede 4 hours ago | parent | prev [-]

They do have tides though, so make it a big fan that points up.

	▲	wbl 21 minutes ago \| parent [-]
		Depends on the canal. The UK narrow boat network has locked everywhere so minimal current in most sections similarly the Netherlands. In fact most canals. But then you have something like Suez which is just open to the ocean.