For many people, lakes are taken for granted. You just think they formed there naturally and most of them have not. Low oxygen is found, particularly the smaller lakes and ponds formed by people. The real problem is aeration. Much like the pumps you would see in aquariums, these pumps can also be useful for small lakes and ponds, but they are a little bit larger and more advanced than the aquarium pumps. Basically, ponds and tiny lakes can be like aquariums.
After a lake is stocked with fish, that lake will need to support the lives of those fish. You should not fish them all out. In fact, you should provide a healthy environment for them to mature and propagate before beginning to fish in the lake. Ideally, the lake will be on the property owned by you but also by other people. The best aeriation pumps for lakes will keep oxygen in the water so the health of the wildlife population will be supported.
Lakes need to be kept alive and, in a way, you could say they need “doctors.” without oxygen in the lake, fish cannot thrive. They die off and this creates a situation of a pond or lake full of rotting fish. This brings in all sorts of toxic algae and bacteria that will ruin the water. If that happens, it can take a great deal of money to restore function and livelihood of the lake.
Water will need to keep circulating for the lake to stay fresh and livable. This is where the aeration comes into play. At the same time, pumps do need to supply a way for water to circulate as well. One of the best and most aesthetic ways to do this is a fountain. Look to the lake experts for the best setup to support life on the lake.