A pond's ability to hold koi should not merely be regarded as a

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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
Sponges in pond pumps ... These days the best pumps do not have sponges inside the suction body. Such sponges are a source of major hassles especially in summer when they block up every couple of days and have to be removed. So long as you keep this type of pump away from heavy debris on bottom of pond (stand the pump on a brick for example) you will get away with removing the sponge permanently ... although such use would nullify the pump's guarantee. The sponge is there to protect the impellor form debris damage. fountain pumps
If you pond is losing water then do a quick check by shutting down the pump. If the level stops falling then the leak is outside the pond itself. If the level continues to fall then obviously the leak is inside the pond itself. When a constant level is reached then you know the leak is at that point where the surface remains level. Leaks from concrete ponds are notoriously difficult to repair and many sealants claim to do the job. In my experience fiberglass resins with glass fiber are best suited and it is worthwhile doing complete resurfacing job. sump 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
Algae Isnt Bad, Is It? Algae can be either beneficial or detrimental to a pond, depending on the owners viewpoint. Algae provide nutrients for newly hatched fry, and indirectly act as a color enhancer. As algae grow in a pond, a population of zooplankton will also develop, on which the fish feed. These natural live feeds help develop the intense coloration desired in most koi. Unfortunately, algae blooms prevent viewing the fish so that sick fish can go undetected for days or even weeks. pond algae and uv
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
How to select the right pond pump .. You only need this information to select right pump ... 1. Vertical height of waterfall inlet above water surface of pond (NOT bottom of pond) ... measure this in feet 2. Width of water overflow point for waterfall ... if overflow is series of smaller overflows add all together to get width in inches. If you have no waterfall choice is easier ... Waterfall Pump Selection Table ... check where height meets width in the table. This is the flow your pump model must deliver. For a wide range of guaranteed. http://www.practical-water-gardens.com/pumpselect.htm pond filter pumps
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
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

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