Good points Sue.
I had not been thinking about the algae. People have died from swimming in water with algae blooms happening. Even though it is a rare event it is something to be aware of. Dogs are even more susceptible.
http://www.discovermoosejaw.com/index.ph...&Itemid=403

There are a lot of other ways algae can kill too. Almost all the deadly toxins in clams are from algae.
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May set off to explore without any sense of direction or how to return.