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How do I treat Fin Rot or Tail Rot? – Water Garden Q & A

Picture of Tail Rot

Q: My mother-in-law has a water garden in her yard. One of her gold fish now has no rear fin. It looks like he had gotten stuck between some rocks or something had gotten a hold of it. The fish is now laying in the rocks, but having a hard time swimming. What do I do? -Faith of Granite Falls, NC

A: When a fish begins to lose their fins or tail, it is usually referred to as “fin rot” which is a bacterial infection. This can happen for many reasons such as stress, poor water quality and/or an over population of fish. Any one of these can all cause a fish’s immune system to become weak making it vulnerable to bacterial infections.

If your fish already shows signs of “fin rot”, the following is recommended: Melafix , Pond Salt and Anti-Bacterial Fish Food. This will treat both externally and internally. Depending on the size of your pond and your ability to isolate sick fish you can choose to treat your entire pond or set up a treatment tank.

Good Fish Keeping Tips to Prevent Diseases:

1.) Use Pond Salt to lower stress. Adding pond salt to your pond will lower stress as well as treat for almost 80% of the common fish diseases.

2.) Maintain good water quality! This can be accomplished by having an adequate filtration system, reducing fish population, less frequent feedings (and use high quality fish food) and by adding natural bacteria such as the DefensePAC to reduce excess nutrients.

3.) DO A SPRING CLEAN OUT!!! Empty the water out if possible, power wash and remove bottom sludge and algae. Oxy-Lift can be a great tool when doing a clean out or performing regular maintenance.

4.) Perform regular water changes. You should do a 10-25% water change every 1-2 weeks. When doing water changes it is always recommended to use Water Conditioner to remove and detoxify chloramines and heavy metals.

5.) Add floating plants such as Water Lettuce and Water Hyacinth to reduce excess nutrients.

Melafix Dosage rate:
You will need ¼ cupful (60 ml) for every 600 U.S. gallons (2,280 L) of pond water. Repeat dose daily for seven days. Results can be seen is as little as four days.

Dosage rate for Pond Salt when treating for disease:
Use 5 cups of salt per 100 gallons – Note at this rate you will have to remove pond plants from the treated pond. If removing plant is not possible, isolate the sick fish into another tank with vigorous aeration.

Dosage rate for Pond Salt to prevent diseases:
1-1/4 cups per 100 gallons (for ponds with plants) and 2-1/2 cups per 100 gallons for ponds without plants.

How Many Fish Can I Have? – Water Garden Q & A

Picture of a School of Fish

Q: How many fish can I have in my water garden? -Several Customers

A: There are many rules of thumbs out there regarding how many fish you can have in your water garden. Just remember, the old saying goes, “The more animals in the barn, the more doo doo to clean up.” With that said, if you have the number of fish that the picture to the left has…my guess is that you have algae! Below I am going to explain the 4-Key Factors in Maintaining a Clean, Clear & Healthy Pond Ecosystem. The way these factors work is this: If you plan to increase your fish load, then you must improve the other 3 to help compensate. Hopefully this helps!

1. The DefensePAC®:
The products included in the DefensePAC provides beneficial bacteria, trace minerals, and a fish and plant safe pond cleaner. The DefensePAC works to breakdown fish waste, leaves or other organics that accumulate in the pond. These are essential to maintain a clean, clear and healthy ecosystem.

2. Fish Load:
When calculating your fish load think of it in pounds of fish or total inches. For example, one 6” fish can weigh as much as four 4” fish. The number of fish will affect the overall fish load, although 10 small fish may only produce the waste of one large fish. With this said, remember that your fish are growing and in many cases multiplying. Always plan for the future and be careful not to overstock your pond.

3. Proper Filtration:
The size and type of your filtration system will depend on your total fish load. If your filter is not properly sized for max potential, your fish will outgrow the filter. In most cases filters on the market are rated for ponds containing no fish or a minimal fish load. It is always best to get a filter that is rated for at least 2x the water volume of your pond.

4. Aquatic Plants:
A simple rule of thumb is to have 60% plant coverage. This should consist of submerged, floating and marginal plants. Floating plants, such as Water Hyacinths, pull their nutrients directly from the water. Rooted plants, such as water lilies and marginal plants, create a great place for your fish to hide from predators. Please note when aquatic plants are not present, algae will take their place.

When to Start Feeding Fish Again – Water Garden Q & A

Q: When do I start feeding my fish again? -Louis of Buffalo, NY

A: Thank you for your inquiry Louis. We recommend using the Spring and Fall Fish Food until the water temperature stays above 55 degrees. The Spring and Fall fish food is a wheat germ formula that s easier for the fish to digest when they are less active in cooler water temperatures. Once the temperature is over 55 degrees start using another blend of fish food such as our growth and color, organic, professional or ponstix.


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