Hey Andy,

If you don't already have it, pick up a copy of Bill Herzog's book "Color Guide to Steelhead Drift Fishing" he's got a section in there on reading water, it's the best explanation I've seen yet. The book is geared towards steelhead, so there's lots of references to water temperature, but I think a lot of what he says carries over to other fish, especially about clarity of water.

Here's the link for Amazon.com http://www.amazon.com/exec/obidos/ASIN/1...5422857-3281504

-N.