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  • Pump head is measured from the pond surface - not the bottom of the pond. Most people make the mistake of measuring from the bottom of the pond and this mistake can easily lead to an over specified pump that will cost more to buy and more to run. When buying pond plants check with the retailer ... how fast they grow and how big they will become. When small, plants can be very misleading. Low cost plants tend to grow big - a very general statement of course but bear it in mind. Floating plants make excellent nutrient scavengers because they tend to be fast growing. pond pump head or pressure

  • Oxygen in ponds ... Aeration of ponds ... Aeration of pond water achieves two things both of which are very good for pond water and the fish: Oxygen levels increase and carbon dioxide is "blown" out of the water and this tends to push up pH levels. Aeration also protects against those algae blooms and their dying - when they die they rot and release carbon dioxide by using up the oxygen resource in the water. In summary it is difficult to over-aerate a pond and aeration has all round advantages in a pond. The downside is the cost of a special aerating pump. All top koi keepers' ponds bubble with air as do their filters. filters and uv light

  • Biofilters and bacteria starters ... Some manufacturers claim that their bio starters contain Nitrosomonas and Nitrobacter. Now it is extremely diffiult to freeze dry and keep alive such sensitive bacteria so any claim should be backed up by definitive proof of the fact that such powders do contain those bacteria and they are in a form that will work. If there was a viable population when packed then the question to be asked is are the bacteria still viable ater "x" weeks on a shelf in non-controlled conditions. If the concoction does not contain Nitrosomonas and Nitrobacter then what value is it anyway? biological pond filters

  • Pond pump don't stop for more than about 60 minutes because,if you keep fish, the biofilter is starved of oxygen. For this reason two smaller pond pumps are often a better choice than a single larger pond pump. The main reason for a biofilter in a pond is NOT to filter the solids out of the water. It is to purify the water by removing offending chemicals. These chemicals are actually produced by the fish themselves by virtue of their normal breathing, eating and toilet behavior. Biofilters need a continuous supply of oxygen sourced from that dissolved in circulating pond water. Beware low oxygen levels in summer. all about pond pumps

  • If you are sick and tired of looking at debris on the bottom of your pond then consider buying an electrically operated vacuum cleaner. Just make sure that it is safe for pond use. OASE make the one that is best known. The latest version is Pondovac 2. For people who do not like to get their hand too mucky when cleaning out a pond there are specially made long length gloves extending right to the shoulder. If the water is a little too cold then the fishermen amongst you could easily use those waders to enter the water if cleaning has to be done. fountain pumps

  • 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

  • I received a very interesting question this week. The question was what is difference between a biofilter and the powder she throws into her pond every week as recommended by a dealer. The powder she was referring to is called a bio-starter or bacteria starter. These powder products are offered by many companies and are probably worthless in practice. The powder is supposed to be a mixture of naturally occurring bacteria that are also found in biofilters. The types of bacteria required for effective biofiltration convert ammonia to nitrites and then to nitrates. All fish ponds need a biofilter. This is non-negotiable. pond biofilters

  • 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

  • Save when you buy koi food or fish food. Check your koi fish food label. Do NOT waste money. Understand the specification on koi food and fish food packets and you will save considerable amounts of money and grow bigger koi fish more quickly. Do not believe everything you are told about koi food it might not be true. Check for yourself easily. Koi Food If a 5 kg bag of koi 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. http://www.practical-water-gardens.com/koifood.htm pond pump selection

  • Algae influence the water quality of the pond mainly by affecting the balance among dissolved oxygen, pH, carbon dioxide and nutrients. Algae produce oxygen, remove nutrients and take up respired carbon dioxide from both the fish and the algae itself. In heavily stocked ponds, the water becomes super-saturated with carbon dioxide. During daylight hours, algae can quickly strip the carbon dioxide out of the water, and pH levels can rise above nine in a matter of hours. Fish not acclimated to such sharp shifts may initially show signs of stress. uv light specification

 

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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