Decided to get an aerator for my new app. 7000 gallon pond. Windmill is too expensive and I can run 125 feet of Romex cable with no issues. Currently stocked with around 100 small gold fish and a few plants. As it cycles I will increase load on the pond. No filters just "a la mother nature." Zone 9a so no ice issues. After much reading I am down to 2 aerators. 1. Laguna 75. 50 watts and puts out 2.47 CFM. Has a 2 year warranty and costs $165 on Amazon. Reviews are OK but some possible issues with noise level. https://www.amazon.com/Laguna-Aerat...coding=UTF8&psc=1&refRID=DQR4KJ7SSZF3QG50RZ90 2. Aquascape 61000 Pond Pro. 45 watts and puts out 2.1 CFM. 3 year warranty. Cost is $260 on Amazon https://www.amazon.com/Aquascape-61...coding=UTF8&psc=1&refRID=5B61XQYK0070ARYMTXAG Now there are many other choices but I have narrowed it down to these 2 pumps. I prefer the one larger diffuser disc on the Aquascape but I don't think the extra one year warranty justifies the $100 higher price tag. Maybe the quality of the Aquascape is superior? Anybody have experience with either of these units? Please don't confuse the issue more by suggesting I look at the Koiair 1 or other units. I have looked at dozens of air pumps and feel that one of the above referenced pumps will serve me well. I had considered the Airmax Koiair 1 but it's output is only .8 CFM. Now maybe that is enough as it is recommended for ponds between 2000 and 8000 gallons. It's a bit confusing as the pumps I mentioned are all recommended for my size pond but the CFM output varies quite a bit. The Laguna has an output 3 times that of the KoiAir!! So are the Laguna and Aquascape overkill or is more air always better. BTW: My pond depth is 2.5-3 feet maximum depth I appreciate any experiences or knowledge you can share. Happy Thanksgiving to all.