How to Raise Fish in an Above Ground Swimming Pool

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Many fish farms will raise fish in pools because it is the most inexpensive way to create and maintain a pond environment. An above-ground swimming pool that is not being used for swimming can easily be turned into a pond. All that is required is a water source, an effective pond filtration system, a fish-safe pool liner, and correct monitoring and maintenance of the water. This is a very effective way to raise koi or to farm fish.

Things You'll Need

  • Pond filter
  • Chlorine remover or water conditioner
  • Water test kit
  • Fish
  • Check if the pool liner is safe for fish. The more expensive pool liners are likely to have been treated with algaecide, which is harmful to fish (see Reference 1). The liner may need to be replaced or covered; a cheap liner should be the safest choice.

  • If the pool is filled, completely drain the water. If desired, wipe down the liner to remove any grime or debris, then fill the pool with water using a garden hose or any other source of water.

  • Add chlorine remover or water conditioner, available at most pet stores, to the water, since tap water has probably been treated with chlorine and contains heavy metals (see Reference 2).

  • Use a test kit to monitor chemical levels in the water on a regular basis. If any level is off, many products on the market can be added to the water to adjust and correct the levels.

  • Install a pond filter to the pool. Since pool liners may become damaged by substrate, the only surface in the pool for beneficial bacteria to grow will be the filter medium. Healthy bacteria are necessary to purify toxins from the water, so a very good filter system must be installed for fish to live. If necessary, bacteria can be purchased commercially.

  • Run the filter and continue monitoring and correcting the chemical levels. Add some goldfish or inexpensive koi to test the waters. If the fish live, it's safe to begin adding fish.

Tips & Warnings

  • Fish need a source of oxygen. A pond aerator or fountain can be installed to provide an oxygen source.

References

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