Hi woodb01
If you plow thru this doc./pdf
http://www.putman.net/brands/ps/downloads/ps_compressed_air_articles.pdfYou'l get a fairly deep understanding on the matter
Pay particular attention to page 15, under quote: 9. Pump away at pumps, and 10. Get a clean shot. quote end.
and page 18, under quote : While temperature and dew point are useful air system measurements,the key metrics are pressure, flow and electrical consumption. quote end.
The hole doc. is well worth reading, but the above cover spesifically the risk of poluting the air going in the pond and the higer costs,
in your type of setup.
