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How To Use These Links
We have extracted brief information about the page you will go to if you
click the link at the end of each paragraph.
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Make access to your biofilter easy. If there is a risk of it overflowing and emptying the pond in the process then try to ensure the overflowing water would find its way back into the pond. This risk is real for most biofilters - if the outlet from the biofilter blocks then the pump will cause the water to overflow through the lid. If you are installing a new pond and arranging for a supply of electricity to it then do add any extra power point for possible future use. pond biofilters
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In winter the filter will continue to operate mechanically at all temperatures above freezing but there is little point in using the U/V unless the temperature of the water rises well past 10C (45F). If this is likely then many U/V clarifier manufacturers advise you fit new a bulb. If it freezes, drain the filter and start again in the spring as though from scratch. This means it will take about 6 weeks for the pond filter to be effective so start up early. all about pond uv and algae
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Must the UV be placed before the biofilter? In theory it does not matter at all but in practice if you have a simple box type filter is must be before the filter. Reasons are: The UV works under small pressure - water must be forced through it while the biofilter drains under gravity. In sand filter systems (which I do NOT recommend) the UV light comes after the pond filter because the whole system is under pressure. Not applicable in many cases but you can also split the flow from your pond pump - part through UV light and part through biofilter. all about pond uv and algae
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Thinking about a pond? ... The pool must be in full sun especially in the UK. Away from trees and prevailing winds that could carry leaves into the pool. Avoid trees with poisonous leaves. In the UK these include Willow, Elder, Poplars, Laburnum, Yew and Oak. Avoid too much exposure to prevailing winds. Avoid boggy areas ii your landscaping ideas. Consider now whether you will have waterfalls, fountains, filters, lights and other accessories like Ultra Violet Clarifiers. You will need an adequate power supply and the connections to cope. Consider accessibility to a water supply. What are you going to do with the excavated soil? Keep the top soil, but what about the rest. fiberglass water features
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Fish food understanding what's important ... ALWAYS, ALWAYS look at the analysis of the koi food you buy. The ash, fibre and moisture percentages are worth absolutely nothing. So the higher these percentages the more the money is being wasted. If a 5 kg bag of food contains 15% ash, 10% moisture and 3% fibre then 28% of the bags contents (amounting to a whopping 1.4 kg) is a total waste of money. This means that the R200 you paid for the 5 kg bag actually resulted in your paying R144 for food (3.6 kg) and R56 for rubbish (1.4 kg). Worse still 18% of the food (ash and fibre pass through the fish) now has to be handled/removed by the filter - 900 gms of solid waste has to be removed from the pond. http://www.practical-water-gardens.com/koifood.htm pond pump selection
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Filamentous algae and blanket weed. Attached filamentous algae can be seen growing on the rocks of a waterfall or on the sides of the pond. The growth of filamentous algae results from high levels of nutrients, carbon dioxide and the catalyst, the suns energy. Methods of controlling filamentous algae include increased shade, reducing the frequency of fish feedings, practical water changes, and the use of chemicals or plecostomus (algae-eating fish) during the summer months. High pH levels suit algae growth of this kind. This is one reason chalk stream or spring creeks tend to have blanket-weed and are very clear. blanketweed in fish ponds
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Plants and algae in a pond compete for the available nutrients in the form of phosphorous and nitrogen containing chemicals. It follows that the more pond plants there are then the greater the probability of reducing algae blooms (green or brown murky water). Old well-planted and chemically stable ponds as a result tend to suffer less from algae problems than newly created young ponds. Yes algae are plants and blanket weed is algae. Ponds with lots of blanket weed tend to have crystal clear water. Blanket weed thrives best in alkaline (higher pH) ponds. pond algae and uv
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Algae Growth (Photosynthesis) ... koi ponds are usually closed recirculating aquatic systems, meaning that these systems, unlike natural ponds with streams flowing through them, lack a fresh-water flow-through source. Rather, closed recirculating aquatic systems rely on filtration to purify and reoxygenate their water. Outdoor ponds that are closed systems are subject to seasonal algae blooms and attached filamentous algae growth due to nutrient and carbon dioxide buildup. The primary nutrients of concern are nitrogen and phosphorus. Nitrogen is a by-product of decomposed fish waste, uneaten fish food and accumulated sludge in the bottom of the pond. uv size required
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It is a good idea to pump out about 10% of your pond water every month or even weekly if you have lots of fish and replenish with tap water. The reason is that nitrate levels slowly build up and can reach a level that is too high for the fish in the pond to tolerate easily. The easiest way to arrange this is to place a valve and "Y" or "T" piece into the pump line then all you need to do is connect a temporary pipe to the valve and lead the pipe to a spot in your garden - pond water makes for a good garden fertilizer. fiberglass water features
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A pond's ability to hold koi should not merely be regarded as a function of its physical ability to hold koi, (ie, like storing groceries in a cupboard). A koi pond's stocking rate is determined by the filter's ability to process and breakdown the waste that koi produce. To be more precise, we need to be sure we do not overstock our filter, rather than our pond. This does not merely focus on the biological activity of a filter, but also it's ability to remove solids at the required turnover rate. A pond's water quality management system would also need to provide sufficient aeration for a given stocking rate. http://www.practical-water-gardens.com/benoverstock.htm pond pump selection
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Never switch off your pond pump for more
than about 60 minutes
Make sure the delivery pipe from the
pond pump is not kinked
Must the UV be placed before the
biofilter?
A waterfall adds oxygen to a pond by
creating a large surface area
Submersible pond pumps can operate
against a closed valve
It is a good idea to pump out about 10%
of your pond water
Lighting in and around ponds creates a
brand new dimension
Sick and tired of looking at debris on
the bottom of your pond?
Do not feed more food than what you fish
can eat
Pond Links and Tips
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