Looks like there may be two 2nd editions out. One is green and one is yellow. I bought mine directly from Cornell about 12 years ago. There is a 3rd edition out, but why waste the money.
It's probably the same stuff rehashed or really big high priced systems. 80 percent failure rate of commercial RAS businesses. To much initial capital to recoup and poor business plans. Bell may be sold by the 19th. Probably some foreign investor. 100 million dollars invested in Bell!
Btw had farm raised steelhead fillets for lunch today from Washington state today. Really really yummy!
