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  • A biofilter is absolutely essential if you want to keep fish in a pond. In my opinion it is cruel not to install a biofilter since without a biofilter the fish will live in a potentially highly toxic environment. A biofilter will automatically start itself up once fish are introduced into a pond. Nitrosomonas and Nitrobacter are naturally occurring and will rapidly find their own way into the filter. They then need oxygen from circulating water as well as excreted ammonia from the fish (this occurs naturally) to thrive and multiply. It will take some considerable time for the biofilter to reach maturity. pond filters

  • UV light water filters, UV lamp changes & pond algae control. Pond volume, stock density and sunlight intensity is required to specify correctly the size of the Ultra violet (UV) light you need to prevent algae making your pond go green For a pond of around 250 gallons in full sun and highly stocked a 4 watt UV will do the job. This will also be big enough for a pond with very few fish and situated in the shade of 700 gallons. This assumes the UV comes equipped with a quartz tube to ensure the UV runs at peak efficiency. For a pond with average stocking an 8 watts UV will handle pond volumes up to around 1200 gallons depending upon the sun/shade situation. http://www.practical-water-gardens.com/artuvcapacity.htm uv maintenance, lamp changes

  • Ponds in winter ... Something very strange happens to water at 4C (39F). Instead of warmer less dense water being at the surface, as in the summer, the density changes and the water that is closest to freezing becomes the least dense and floats to the top. The result is that the bottom stays at a fairly steady temperature under a blanket of cold or frozen water. If the pool freezes, there is nothing to worry about for a few days. There is plenty of oxygen in cold water even if the fish needed it. But if there is any rotting matter in the bottom of the pool, toxic gases produced in the muck could build up. In order to maintain gaseous exchange between the water and the air, float a ball or a piece of wood in the pool. all about ponds and waterfalls

  • Spring has arrived. Pool lights which give an aura of nighttime mystery around the pond can come back out now. Check the water quality. Many serious fish keepers will do a partial water change of up to one third in order to dilute any build up of salts and chemicals they may have been adding. As the water temperature gets nearer to 10C (50 F) you can start feed the fish their normal food. A bit of live daphnia would be a special treat or chopped worms, yummy! preformed garden ponds

  • The pond filter as winter approaches ... if you have not looked already the filter is in need of a major service. The Ultra Violet clarifier needs cleaning too if you have one. The filter needs back flushing if you have that facility, otherwise scoop out the medium and rinse it in pond water or rainwater to flush out the worst of the muck. It does not need to be spotlessly clean, but check the chamber in the base because if the system has been overloaded at some time in the summer the evidence will be there to see. Scoop out this mess and rinse with pond or rainwater water. water gardens and pond filters

  • 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

  • Winter and garden ponds. Tender marginals need to be removed wholesale. Canna lilies can be potted up and plunged into a bed in cold frames, otherwise keep them cool but frost free and dry along with all the other exotics you have been tempted buy over the last few months. Once upon a time Arum lilies (Zantedeschia aethiopica Crowborough ) and Lobelia cardinalis were treated with the same respect, but now our winters seem quite bearable to them. The more exotic looking yellow and spotty leafed Zantedeschia elliotiana , Z. pentlandii ... Store them under greenhouse staging. oxygenator pond plants

  • Vegetable BioFilters ... Aquatic Plants For Gold Fish and Koi Ponds The idea of using vegetable filters (also called veggie filters is an area where plants are deliberately grown en masse) to remove algae for Nitrate control and green water control is not new by any means. It has found use in systems where people do not want or cannot afford UV systems. Concerns expressed about vegetable filters include blocking of pump impellers by stray roots and leaves. Some plants would be worse than others ... eg water hyacinth. Despite this they are excellent nitrogen removers. An ideal plant to use is Azolla also called Fairy Moss. It grows extremely quickly and is capable of removing large amounts of nitrogen and of course carbon through photosynthesis. It is also easy to remove simply by netting in the event it over-runs the filter area. http://www.pond-solutions.co.uk/pjmvegfilter.htm water gardens and pond filters

  • Pumps ... most small submersible pumps have impellors designed to turn in a single direction. This type normally have curved rotor blades for improved pumping efficiency. To make sure they do not start up in the wrong direction when you switch them on this type of rotor can only be turned by hand about 3/4 of a turn before it comes to a deliberate stop. If and when your pump suddenly stops pumping this is the first and easiest test to do to find out if the rotor needs changing or if something more serious is wrong with your pump. If the blades go round and round and round you probably just need a new rotor. pond pump flow rates

  • Not got a biological filter? Then all the microbial activity that happens in biological filters has to happen in the bottom of the pool. All the muck that falls has to be digested by bacteria down there. But with the advent of winter this activity slows right down at a time of year when the potential load is increased by falling autumn leaves. Any leaves that have found their way in to the pool need to be dredged out with a net. Leave the resulting muck to drain away on the side of the pool for 24 hours. This will give time for any wildlife to make its way back into the pool. using pond filters for clean ponds

 

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

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