Pond Blog


Preparing your pond for winter

There are several key areas to consider when preparing your pond for winter.

These areas are the following:
1. fish
2. pond plants
3. debris and leaves
4. pond heater,bubbler and other equipment.

As water temperature goes down the fish become less active and eat less. Switching the pond food to a spring/fall diet will help get the fish ready to hibernate for the winter. When water temperature goes below 50 discontinue feeding.

Pond plants
Discard all floating water hyicanths and water lettuce before they decompose.
All tropical plants should be stored appropriately indoors. Cut back hardy marginals. Hardy marginals like sweetflag, cattail, iris and hibiscus can freeze while others like pickerel rush should be dropped to 18" deep. Hardy water lilies and lotus should be placed in the deep end of the pond.

Debris and leaves
Remove excess debris and leaves as these can "sour" and pollute the pond. Cover the pond with a pond net to prevent leaves from blowing into the pond.

Pond heater, bubbler,and other equipment
Since most ponds have a deep area of about 24" deep the use of a floating pond heater and bubbler ensures that there will be adequate air/gas exchange allowing the fish to winter. All pond equipment that can be removed like pumps, filters and UV sterilizers should be removed and stored appropriately. Filters should be drained of water to prevent freezing.


Maintaining water quality and clarity in ponds

The dog days of summer are here and summer's hot weather, strong sun and thunderstorms with ground drenching rains are wrecking havoc on many goldfish and koi ponds.

Here are my suggestions and strategies to help alleviate these issues:
1. Never overcrowd or overfeed ponds. Realize that in most ponds there is a lot of natural food for the fish to consume. Feeding 3 times weekly is more than adequate.
2. Test water chemistry weekly. If necessary perform partial water changes.
3. Keep filters and pumps running at optimal levels 24 hours a day.
4. To clear algae add 1/2 dose of algaecide. Make sure water is vigorously aerated to minimize oxygen starvation.
5. Make sure that ground water run off is not entering your pond.If there is sediment floating in the pond then use a water clarifier. In addition, making landscaping  changes to eliminate ground water from entering pond will prove invaluable.

If clarity and or quality is still an issue then call me at 203-323-4277 so that we can work together to fix the problem.



Pond Plants

The addition of pond plants are essential when creating a balanced pond.

The various types of pond plants include:marginal (hardy and tropical), floating plants like water hyacinth and water lettuce which are annuals, water lilies and lotus (hardy and tropical), and oxygenating plants like cabomba, hornwort and narrow leaf anacharis.

Typically marginal go just under the waters surface.Water lilies sit at the bottom of the pond at about 24" deep. Water lotus go 4-6" under the water. Having plants in a pond reduces algae because the plants consume nutrients which give rise to algae. In addition, plants provide hiding places for the fish, beauty, color and dimension for the pond, areas for the fish eggs to be affixed and finally places for baby fish to hide.

All annuals should be removed and discarded in the fall. All tropical should be removed and winterized in -doors or in a greenhouse. Hardy marginal like sweetflag, cattail, iris, and hibiscus can freeze. Other hardy marginals should be placed about 18" under water. Hardy lotus should be placed at 18-24" underwater. When winterizing the plants all dead or damaged foliage should be removed and discarded.



Pond Fish Compatibility

Generally speaking goldfish and koi are vegetarians and therefore compatible with each other.   

When mixing various sizes of fish it is important to make sure that the food that is being fed is the appropriate size. In addition, as the fish grow it is important to increase the size of the food so that the fish will benefit nutritionally.

The following are different types that will co-exist in a pond:domestic and imported koi,comets,calico shubunkins. This season we have seen regular comets, red and white comets, apricot and lemon comets. I have also had some customers include fancy goldfish and channel cats with their pond fish successfully.

Generally if the pond is more than 24" deep the fish should winter with the aid of a pond heater. The pond heater is not meant to heat the pond but rather to have an opening so that there is a gas and air exchange. Unfortunately with  this years harsh winter many ponds lost fish. I believe that aerating the pond with a pond heater amounts to cheap insurance for your fish and therefore should be used by all pond customers.


How to manage your pond

Now that our Koi and goldfish ponds have had their annual spring cleaning we are ready for an enjoyable water gardening season.

I have always stressed that customers attempt to create an ecco system of balance.In this ecco system  of balance we are striving to achieve good water quality and clarity by having the nutrients from fish waste,energy from the sun,live plants,filters,and additives all balance out.In order to achieve this the pond should have at least 40-50%live plants,not be overcrowded with fish.The fish cannot be overfed and the filters must be kept clean. Tadpoles and snails also help in creating this ecco system as they are algae eaters. Barley,barley extract and algaecides can be used to also control algae growth and water clarity.

In cases where water clarity ,despite best efforts,cannot be achieved installing an ultraviolet sterilizer(UV) will resolve algae issues.

The UV needs to be the proper size  for the pond.ie.the volume of the pond must pass the UV bulb once per hour and the sterilizer has to be rated by the manufacturer to handle that volume. Please note that if the filter begins clogging  up the pump volume  will decrease causing less water to flow past the UV therefore the filter needs to be kept clean for the UV to be effective.


Spring Cleaning Koi and Goldfish Ponds

Just like many people perform spring cleanings on their homes and apartments, owners of Koi and Goldfish ponds should be thinking about performing spring cleaning on them.

Weather  and temperature permitting, I usually begin doing spring cleanings for customers mid April or there abouts.

While I am sure there are many methods to cleaning a Koi or Goldfish pond, my method has been refined by nearly thirty years of field testing and experiences. I would also like to add that throughout these hundreds of cleanings we have had only one fish fatality when a small Goldfish jumped out of a holding container and remained out of water unnoticed.

As is the case when dealing with livestock, the sequence of steps is critical and time is of the essence.
   1. Pump water out of pond into appropriately sized aerated containers.
   2. Pump water down to about 6" high.This will facilitate fish removal.
   3. Remove,if possible,live plants and cover them with wet newspaper.
   4. Catch fish,cover aerated containers to prevent them from jumping out.
   5. Pump out remaining water.
   6. Powerwash sides and pond bottom.
   7. Pump out and remove sludge.
   8. Clean filters.
   9. Refill with tap water.
  10. Add appropriate amount of water conditioner and pond salt.
  11. While refilling ,return fish and plants into pond.

Feed sparingly over the next few weeks and monitor water chemistry.






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