I am making a pond this summer. It will be around 500g. I'm looking for an air pump and a water pump. If you could leave name size and price. This would help me and maybe others.
Check out the Laguna Max-Flo line of pumps. I have their largest model (4200) and I really like it (efficient and quiet). It cost me $200 on Amazon. I have no experience with outdoor rated air pumps, so I can't help you there.