Frequently Asked Questions

General Maintenance

Is my pond going to be Maintenance free?
NO! There is however a low maintenance filtration system which may require as little as ten minutes of your time on a monthly or bi-monthly basis. Biological filters remove nutrients and waste products from your pond, thus starving any algae from the essential food it needs to thrive. These types of filters must run 24 hours a day. In an unfiltered pond, a huge amount of aquatic plants and very few fish may result in a temporary biological balance, but once fish grow and breed it may be impossible to sustain this balance.

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How can i stop my pond from Going Green?
A green pond can be caused by several factors. These include lack of filtration, incorrect pH values, overfeeding and overstocking of fish, excess sunlight and lack of proper maintenance. If your pond is well filtered and is still green, often the pH may be too high or low, causing the filter to work inefficiently. High pH levels can cause several problems, such as algal blooms because of the favourable conditions for it to flourish. Overfeeding & or overstocking of your pond can be easily rectified by simply reducing the amount of food given and also the amount of fish. Excess sunlight can also lead to problems with algae blooms. Increased filtration and the use of an Ultra Violet Clarifier will help solve this problem. Alternatively, a cover can be erected over the pond to give more shade. Algaecides are also available, and these are most affective when used as a short term remedy. Sometimes after a long holiday or when regular maintenance has not been possible, an algaecide can help regain the balance and clarity of your pond.

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Is Full sun going to be a problem for my pond?
If you have both sun and shaded areas that you were considering installing a pond, the shaded areas would be preferable. Most plants prefer a little shade, and it is only the “Lily’s” that prefer at least half a day of full sun. If your pond is in full sun, accessories such as Ultra Violet Clarifiers can guarantee clear water when used correctly. They work on a principal of radiating water containing algae cells, effectively killing algae before it can bloom in your pond. The chance of a pond in full sun getting too hot is almost negligible when a pump is moving water. Moving water releases stored heat quicker than a stagnant pond, and if a minimum depth has been applied then you should have no worries.

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I have lots of stringy algae that looks like hair, what can I do?
String Algae is usually a sign of an imbalance within the pond. Reducing the amount of feed and ensuring you have a good biological filter that operates 24hrs a day will help remove excess nutrients from the pond. String algae prefers water with high pH so testing your water and reducing your pH with Clearpond pH down or Oase pH minus will also help. Oase Aquahumin will also help with String Algae by naturally reducing the pH of the water and changing the water to conditions unfavourable to string algae. String algae can also be controlled electronically by the Clearpond Algaeguard.

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There's a lot of sludge on the bottom of my pond, what can I do?
You can vacuum sludge and all the muck from the bottom of your pond using a pond vacuum cleaner such as the Pondovac from Oase or Pondomatic from Pontec. These are electronic vacuums that do a great job of removing wast and saving water by preventing the need to drain and muck out ponds. The Clearpond Turbovac is another option that operates without the need for power. The Turbovac works off the garden hose and does a great job at a fraction of the cost of the electrical versions. Sludge can also be reduced by using bacterial type products like Clearpond Pondzyme or Oase Silt Remover. These products are a great maintenance aid for all ponds as they consume organic waste and reduce algae within the pond.

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Why are my fish dying?
Some common reasons why fish die are; -build up of toxins caused by lack of filtration, overfeeding or too many fish in the system -poor water conditions or sudden changes to water conditions -low oxygen in the water from lack of aeration -predators such as birds or mammals -parasites or disease Keeping fish in ponds is easy with the right equipment. If you loose fish speak to your local retailer and identify some of the possible reasons why. In most cases simple changes to your system will get you back on track and give your fish a safe environment to thrive.

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I'm worried about wasting water, do I have to empty my pond to clean it?
No, in fact emptying your pond is the last thing you want to do, especially if you’ve got fish because they’ve gotten used to the environment in which they’re living and if you change all their water it will put them under much stress. Completely changing the water also provides any algae with nutrients from the new water and could make algae problems worse. The most effective way of cleaning your pond without wasting water or breaking your back is by using a pond vacuum cleaner. These products will remove the sludge from the bottom of the pond and allow you to reuse the water back in the pond or put it on your garden. There are electronic vacuum cleaners such as the Oase Pondovac and Pontec Pondomatic or products that will work from your garden hose such as the Clearpond Turbovac. With these products the need to completely empty your pond will be eliminated.

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Can I use rain water in my pond?
Yes, but you will need to use some mineral additives to make it better for the fish. In nature, rain water enters rivers and streams from runoff. During the runoff the water collects minerals from rocks and soil before entering the river or lake. Fish and plants need these minerals to thrive. Rain water collected from your roof has none of these minerals and is classed as ‘soft’. The easiest way to add these minerals is by additives such as Oase’s Hardness Plus. Your fish and plants will thank you for it! It is also best to not use rain water from the first rain and not use rain water if you are in an industrial area. If you’re worried about your water quality it is best to have it tested.

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Can I use grey water in my pond?
No, grey water has excess nutrients and chemicals that will kill your fish and pollute the pond.

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Can I use the pond water on my garden?
Yes, pond water is an excellent garden fertiliser but don’t put it on the garden if you’ve been using water treatments in your pond.
And dont use pond water on plants that are to be eaten by humans & animals.

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How can I keep my pond clean?
The best way to keep your pond clean is by a pump, biological filter and UV clarifier suited to the size and type of your pond. Oase filtration systems offer you a clear water money back guarantee when used within the manufacturer’s specifications. You can read more about these products in the filtration section. You should also remove the sludge from your pond floor because as this breaks down it releases nutrients that encourage algae to grow. The pond vacuum products mentioned above are best for this.

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How can I stop the birds eating my fish?
Providing hiding spots for the fish by putting logs, plastic pipes and plants will help but sometimes you may have to resort to netting until the birds loose interest (and the fish grow too big for the birds to eat).

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Do I have to feed my fish?
Yes, we recommend using a premium quality fish food such as Oase Fishfit. This will ensure you have beautiful strong fish with bright colours. When you do feed your fish only give them what they can finish in two minutes. Uneaten fish food is a major food source of algae in ponds.

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I'm not much of a gardener, are pond plants hard to keep?
No, as long as they receive a good dose of sunlight and regular fertilising using Aqua Grow Pond Tablets. These are slow release fertiliser tablets that you push down into the roots of the plants so they wont break down and pollute the water. Never add fertiliser directly to the water and don’t use manure as this will provide excess nutrients that will result in algae blooms.

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Can I have a pond during water restrictions?
Yes, existing ponds with fish are exempt from water restrictions (you’ve got to keep your fish alive) but please check with local authorities before installing a pond or water feature.

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Where should I buy my pond products?
From stores that carry a good selection of products and have knowledgeable staff. Getting the right advice and equipment is critical to the success of your pond. If your store doesn’t have many pond products and can’t answer your questions then you should question their expertise and may be better off going somewhere else. Installing the wrong equipment can prove costly in the long run when you have to replace it. The cheapest way to build a pond is to do it right the first time so it’s worth the time finding a retailer that is right for you. You can select one of our dealers from the "Where to Buy" link at the top of the page.

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