Frequently Asked Questions

  1. Why does pond water turn green?

    Unicellular algal cells occur naturally in water and remain virtually invisible to the naked eye when they are low in number. When a bottle of tap water, low in nutrients, is exposed to sunshine, some green algae will start to form little green spots on the walls of the transparent container. If this water is further enriched with nutrients from fertilisers, uneaten food and faeces, these algal cells can make use of the nutrients in combination with energy from sunshine to multiply rapidly. A high density of the population makes the algae visible and turns the water green, thus causing algal bloom.

  2. What makes the pond water smelly?

    In a properly maintained and stocked fish pond, the smell is negligible. However, most ornamental fish ponds are over-stocked (as the fish grow) and overfed. The uneaten fish food and large amounts of faeces creates an anaerobic conditions that favour the formation of hydrogen sulphide and ammonia compounds which ultimately generate unpleasant odour. In addition, the mucous covering the fishes’ body also contributes a fishy smell in the pond water.

  3. What microbial organisms are involved in the ecoservice that is being done? Is there a small volume of this in the system in the pond?

    There are numerous types of microflora and microfauna in the system which can be simplified as aerobic and anaerobic in nature. The aerobic will flourish in oxygen-rich conditions while anaerobic micro-organisms are those that grow well in an oxygen-deprived environment.

  4. What are the common measures of good quality water conditions with fishes in the pond?

    The common parameters are pH and ammonia. The ideal pH level is as close to 7 as possible, but if the fish is neglected, it can rise up to 8 or more and this stressful environment will cause the fish to be sluggish and lose their appetite. If not rectified, the fish would die. The preferred ammonia level is as near zero as possible. In most cases, a sudden increase to 3ppm (3mg/1 litre) is known to be deadly to most fish. The sudden increase can be caused by overfeeding and the consequent decay of uneaten food.

  5. What will be the pH and ammonia level after installing the Eco-Sand System™?

    In a pond fitted with the Eco-Sand System™, the pH remains stable at around 7. The ammonia is limited to a healthy 0.2-0.5ppm.

  6. What is the main difference between a bio-filter and the Eco-Sand System™?

    Although both systems utilise micro-organisms to remove the organic load in ponds, the colonies of micro-organisms in the Eco-Sand System™ are selfsustaining, stable and will continuously regenerate itself year after year while the bio-filter systems must be refreshed once every few months.

  7. Does that mean the Eco-Sand System™ is maintenance-free?

    The Eco-Sand™ microbes are self-sustaining but the mechanical pumps which circulate the water in the pond need replacement when they breakdown.Service periods of 12 months are recommended to ensure that the pumps are all in working order. At the same time, some surface cleaning of the sand is done to ensure that the entire sand filter remains at its optimum level.

  8. Will my fishes be stressed or displaced during maintenance?

    The scheduled pond servicing will not cause any stress to the fish and they can remain in the water while the service is being done. There will be a small volume of water removed, up to 20%, during the removal of accumulated dead algae and other organic biomass.

  9. Does the pond require flushing when installed with the Eco-Sand System™?

    It is advisable that the pond installed with the Eco-Sand System™ be flushed after rain. This is to reduce the impact of acidity of rain water which is harmful to the fishes.

  10. What is the frequency of feeding my fish each day?

    You can feed your fish twice per day. It is also advisable that you withhold feeding one day in a week.

  11. How do I know if the pump in the pond is still functioning?

    When the water in your pond starts to turn murky, this is an indication that the pump may be faulty and requires servicing or replacement.

  12. I have an existing pond, how can I install the Eco-Sand System™ in my pond?

    The Eco-Sand System™ can be installed or implemented in an existing or new pond. The only requirement is an overflow pipe and a flat base at the bottom of the pond.

 
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