I recently purchased a CB60 aerator for my pond. I researched a bit, visiting different people who owned large 4-5 acres and small ¼ acres ponds. What I learned is buy quality, get air volume, and most important quiet operation. I found other units for less, but they only delivered 2 of the 3 criteria at best. The CB60 has met and exceeded my expectations. You can literally sit directly beside it while running and whisper to someone. Other brand units that put out compatible volume of air sound like the flat tire air pump at Wal-Mart. The volume of air is such that it has a circulation effect throughout the entire pond. No more stagnant water smell. Even your neighbors will notice a difference mine did! I highly recommend this product and have had a positive (no high pressure sales pitch) experience dealing with Sanco Industries Inc. This is a company I will do business with again.