I need some advise please. I have a 350 gallon below ground pond. I mixed fancies and some common goldfish in there and I do weekly 50% water changes with no problems. I have a waterfall and a pump-filter set up as well separate from the waterfall pump. The pond has two large plants and it used to have lilies but they died this fall and hopefully they will come out in the spring. This is my first 4 month owning a pond, so my knowledge is poor at best. Winter is coming.... I bought an aerator for the pond (and a de-icer). If I put an aerator in the pond, it will go in the quiet deeper end (2 feet). Should I do that? I read somewhere that the ranchus need quiet water. I'm at goldfish limit with that pond but many of them are small and I plan to make it 1 foot deeper in the future. Aerator or not in the quiet section?