Mario and Dave your right about Ebay. More than once we have been called to help someone who has purchased from Ebay. One in particular purchased a compressor. It had no fan guards, no plug and a capacitor that was hanging loose. They did not have any idea how to create bubbles from this compressor, but they paid a little bit less than our compressor would be completely ready to go.

Heybud and Sue are right too. As much information as can be given to whomever is sizing a system for a pond is perfect. We all plug this info into our on programs to spit out what system is best for each pond. Mapping programs just add to the "coolness" factor but they do aid in making sure the measurements are right and the placement of the diffusers is correct.