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5 Tips for Maintaining Fish in a Pond

Anthony Dulio at American Underwaterservices is an expert in maintaining fish in a pond. Regardless if you have fish or other wildlife living in your HOA, golf course, or backyard pond, you’re going to need to perform regular maintenance to ensure a long and healthy life for all aquatic inhabitants. Follow Anthony’s five favorite tips below to maintain a healthy fish pond.

Since most ponds are pretty small, the water composition and chemistry can change in a very short period of time, and that can have catastrophic consequences for the fish, amphibians, and reptiles.

Small ponds are more prone to fish die-offs than large ones because the natural processes that regulate water quality aren’t as abundant in a little body of water. Things happen much more quickly in a small pond, and chemical imbalances are much more severe than in a larger body of water such as a lake.

We’re going to show you Anthony’s five favorite tips for maintaining fish and other aquatic wildlife in your pond.

  1. Water Quality in a Fish Pond
    Keeping the chemical makeup of your water at a certain level is extremely important for the health and longevity of a pond. Just one parameter that’s off can cause a complete and total fish die-off. The beneficial bacteria that live inside your pond and help biodegrade organic waste can also be susceptible to poor water quality.

    The best way to maintain water parameters is to test your water every week. You can buy test strips online that you dip into a small sample of the pond water. In a few minutes, they will tell you which parameters are off.

    While adding chemicals to counter bad water parameters is one way to remedy the problem, an ideal way is to find the cause of the bad water quality and then remove it. The pond should return to a healthy water balance after the issue has been removed.

  2. Adding Ammonia and Nitrates to a Fish Pond
    While ammonia and nitrates can be included in the above water quality section, we wanted to specifically call them out. They’re specifically caused by bacteria that break down organic matter. When the ammonia or nitrate levels get too high, fish and other aquatic wildlife can die off in a matter of a few hours.

    While you can add chemicals to reduce the nitrate and ammonia levels in a pond, you’re not fixing the actual cause of the problem. A professional pond dredging is the best way to remove the organic sediment lying at the bottom of the pond that’s causing the ammonia and nitrate overload.

  3. Fish Population
    To maintain a healthy fish population, be sure to have no more than 10 inches of fish for every 100 gallons of water. This will not only ensure less competition for food but will cut down on excessive fish waste, which can lead to ammonia and nitrate levels rising out of control.

    If you feed the fish, do so sparingly. Overfeeding can not only cause unhealthy obesity in fish (yes, that’s an actual medical condition), but it can also add an extreme amount of nutrients which can then lead to a nuisance algae outbreak. The general rule of thumb is to feed your fish once per day, and no more than they can eat in two to three minutes.

  4. Maintain Proper Oxygen Levels in a Fish Pond
    Your pond should have an aerator that physically agitates the water and moves it around to facilitate the oxygen exchange from the air. The pump or aerator should be powerful enough to circulate the entire volume of water in your pond every hour.

    Each pump or aerator has its own flow limits, so be sure to check the manufacturer’s instructions to ensure that you’re not buying one that can’t handle the gallon-per-minute flow that’s required by your pond. Once installed, check the periodically for algae and debris as they can severely impede the flow of water and that in turn can cause oxygen levels to drop rapidly.

  5. Clear Debris from the Pond Banks
    Finally, clear any leaves or other organic matter from the sides and banks of your pond. Bird droppings can contain a veritable petri dish of harmful bacteria that can enter into your water column. Instead of washing it off with a garden hose, try to physically clean it up with a pair of gloves and a trash bag.

    If you don’t clear the organic debris from the sides of your pond, it will eventually get deposited into the water via a gust of wind or rainstorm and then make its way towards the bottom where it will add untold amounts of harmful nutrients and other chemicals to the water.

  6. Pond Dredging for a Healthy Fish Habitat
    If you have Koi or other game fish in your pond, such as bass or trout, you owe it to your slimy friends to maintain the water environment that they live in. If your fish could talk, they would thank you dearly for keeping their water healthy and clean. One of the best things you can do as a pond owner is to have it dredged at least once a year.

    The removal of harmful organic sediment will not only prevent the need for expensive and potentially dangerous chemical additives, but the debris itself can be used as fertilizer for plants and flowers.

  7. At American Underwater Services, we have over 20 years of HOA pond dredging experience. Give us a call at (817) 377-8512, and one of our friendly dredging experts will be more than happy to answer any questions you might have.




Anthony Di Iulio the founder, president and co-owner of American Underwater Services, Inc., started his business in 1999 with only three employees. Today this commercial diving company employs nearly 30 people and handles over 500 projects annually. Anthony moved to Fort Worth from Louisiana with his family in 1976. He worked summers during high school welding underwater for a marina on Benbrook Lake. Eventually he took scuba lessons after almost drowning on the job. Those lessons led him to training at a deep sea diving school in Houston, which included training on offshore oil rigs. Anthony spent several years in Louisiana working on offshore rigs and on inland jobs at power plants and dams before starting American Underwater Services, Inc.


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