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  • 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

  • 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

  • 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

  • Koi will normally stop feeding around 8 degrees centigrade, 46 degrees Fahrenheit. They will lie motionless at the bottom of the pond when water gets down to about these levels. They must NOT be fed when water temperature is at these levels under any circumstances. Many serious koi keepers now heat their ponds in winter to keep their fish active and growing. water gardening and water features

  • Pond pumps and running costs. Before buying any pump check what the running cost will be. Look on pump box and if you can find watts consumed multiply this by 8.76 and you will get units (kWhrs) of electricity consumed every year by your pump. Find cost per unit and you can work out running cost of the pump. If you can only see amps on box you can work out watts as follows: amps x voltage of mains supply = watts. Once again multiply by 8.76 to get annual cost. use this figure to compare costs of 2 different pumps since running cost is generally far more important than the purchase cost. waterfall pumps

  • 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

  • Measuring pond volume using science .. this is worth pointing out for its simple but brilliant bit of chemistry. Once more I am grateful to a reader for pointing this out to me. This method depends upon a pondkeeper using salt in the pond water. By measuring the salt concentration in the pond water before and after adding a known amount (lbs) of salt to the pond it is possible to calculate the pond volume very accurately and easily assuming the salt hydrometer is also accurate. If you want to know more e mail me and I will send you a calculator pond pump head or pressure

  • Oygenators, pond plants ...The best by far for the pool or pond. is also often referred to as "Curly Pond Weed" but is most rightly called aragasiphon major or more commonly Elodea crispa (South African native). This has a tendency to take advantage of highly nutritious pond environments by filling them up, but at least you don't get algae. It is easy to control by just snapping handfuls of it near to the source of growth. Fish love to spawn on or near it and it is dense enough to provide protection for the eggs and the subsequent fry. For indigenous plants to the UK: Water Starwort, (Callatriche stagnalis), rampant but easy to crop to its source. marginal pond plants

  • Use garden pond bottom waste on the compost heap. This organic matter is full of mainly anaerobic bacteria which will catalyze the composting process. Backflushings from the pond filter can be sprayed onto the lawn or garden as a source of nitrogen fertilizer. Use black or opaque pipes in your pond instead of transparent low cost plastic tubing. Since light cannot penetrate the black piping the algae growth inside the pipe will be very considerably reduced. This means less maintenance and also less expenditure on replacing transparent pipe when it becomes clogged with algae. submersible pumps

  • Oygenators, pond plants ... All plants that live happily under water can be described as oxygenators. Out of these plants there are bound to be one or two that are the best for the job we need them to do. There is no doubt they are specialised. Roots tend to be merely for anchorage and the nutrition absorption and gaseous exchange occurs on the surface of the plant directly to each cell. The plant therefore has very thin walls and thin leaves to allow this to happen. This makes the plants floppy, which in fact becomes an advantage under water as they are able to bend with the eddies in the water. Two plants that have made this a real speciality and thrive in streams are Water Crowfoot, the true Water Buttercup (Ranunculus aquatalis) and Curly Pond Weed (Potamageton crispus). all about garden pond plants

 

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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