Fish need a specific level of oxygen to thrive and reproduce. An older pond can accumulate excess organic material that releases carbon dioxide and hydrogen sulfide that depletes dissolved oxygen. Low oxygen causes algae blooms and kills fish. Aerators pond equipment work 24-hours a day deep beneath the surface. This increases water circulation, releases toxic gases and improves the oxygen levels. Pond aerators stimulate the growth of beneficial bacteria that breaks down organic material and controls odor. They can also prevent fish kills that occur when ponds freeze over and trap toxic gases. Properly aerated ponds need fewer maintenance products.
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Yes, you can purchase pond aerators for your private residence. No, they do not have to be professionally installed but I would recommend that you do have someone install it for you.
The best place to find reviews on such products as aerators is online. You can find reviews from the companies that make the aerators and you can find reviews on the aerators by people who actually use the products.
No
To Put A Fish in the Pond: You hold a fish standing next to the fish pond, then press A to drop the fish in the pond To Take a Fish out of the Pond: Stand in front of the brown sign at the pond. Press A and it will ask you what fish you want. Select the fish and you will be holding it.
There are many places to purchase pond fish. A local home improvement or garden store will be the easiest place to find pond fish. Also online retailers will offer pond fish.
If the pond is not deep, the fish can leave the pond. It is important to take good care of them or they will be tempted to leave.
in a lake/pond
That depends on the species and size of the fish and the pond it came from.
Intransitive, because it can't take a direct object. In the pond, fish abound. Fish (subject) abound (verb). The pond abounds with fish. Pond (subject) abounds (verb) with fish (prepositional phrase). But never this: The pond abounds fish. Pond (subject) abounds (verb) fish (direct object). That last construction doesn't exist.
Area of fish pond: pi*9^2 = 81*pi square feet
Aerators to reduce the flow.