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                        The pond has a Power Failure

The pond has a power failure

 

Will my fish come to any harm?

If your fish are used to having moving water from a filter, fountain, or waterfall then the failure of the pump might cause problems. This movement usually helps to aerate the water and increases its oxygen content. Problems are more likely in warm weather when fish, pond wildlife, and filter organisms are using more oxygen from the water. Problems are less likely in winter as cold water usually contains more dissolved oxygen to start with. Fish also slow down and use less oxygen in cold weather. www.watergardensolutions.co.uk

As long as your pond is not overstocked, a power cut of an hour or so in summer, or of up to a day in the depths of winter, is unlikely to cause immediate problems.

What if the power cut starts to cause problems?

The oxygen levels in the water will start to drop. The fish may start mouthing at the surface of the water. Organisms inside a biological filter will stop functioning correctly. If the problem persists, fish (especially larger fish, or oxygen sensitive fish like orfe) may start to die, and the filter organisms may die back.

What can I do?

Stop feeding the fish.

The oxygen levels in the water can be increased by maximising the water surface exposed to the air. Remove excess/yellowed floating leaves from waterlilies and excess quantities of floating aquatic plants (like duckweed).

Spray in tap water. A jetted stream of tap water from a hose directed onto the pond surface will both aerate and circulate the pool water as well as slowly changing some of the water. If you end up changing more than 5-10% of the water you should use a suitable water conditioner to reduce the risk of damage from the chlorine in the tap water

If you have a raised box filter with a drain tap, drain some water from the base to flush out the worst of the debris.

A pond and filter that are well maintained will have fewer problems in the event of a power cut. By routinely removing excess wastes and debris from the pond and filter, there will be less waste to use up the oxygen in the water. However, don’t attempt to disturb the debris on the pool base in the middle of a power cut, as stirring this up will only use up valuable oxygen.

When the power restarts

Drain stagnant water from any filter system to waste. If the filter is dirty, gently clean any filter pads/brushes in a bucket of old pond water before restarting the filter. If the power has been off for some time, the biological filter organisms could take three to six weeks to recover. Feed fish very lightly during this period and do not add any new fish stocks.

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