[flyingwelshman]

Originally Posted by skygazer

Also there is a big difference between a fast, clean, high sided sailboat, and a slow, low raft acting like a tea-strainer, letting the water through but staining out the flying fish. Bet they also had their own ecosystem on the underside of the logs, carrying along their own nutrients. Weren't those logs green when they started?

That may be a part of it - they definitely did develop their own community of pilot fish etc.

The logs were freshly cut. Ants were a problem for a while.