A biofilter is absolutely essential if you want to keep fish in

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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
Too much algae in pond .... Beware algae blooms in ponds. Let's equate this to what living organisms do in the pond. Think of the flora and fauna as exhaling carbon dioxide while inhaling oxygen during the night. From this you will agree that dawn is the critical time in a pond. Often people wake up to find dead fish and wondered what happened. Such deaths could be associated with very low oxygen levels coinciding with high carbon dioxide levels. When ponds are full of suspended algae such problems can arise. pond algae
Winter water gardening ... If the frosts are slow to arrive, the foliage factor from some of the variegated water plants is a major bonus. The sword like leaves of the Iris laevigata Variegata, the variegated scented rush Acorus calamus Variegatus or the small tufty A. gramineus Vareigatus are late to die down and are up early spring, brightening up the most moribund boggy patch. Gardeners garters (Phalaris arundinacea var. picta) add a splash of colour all year, but are somewhat rampant and difficult to contain after the first year floating pond plants
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
Oxygen in ponds ... On occasions fish in ponds with no fountains or waterfalls may look listless in winter due to carbon dioxide levels being excessive but the problem quickly sorts itself out when windy and bright weather returns. In summer water can hold much less oxygen and the animal and plant life (algae) is also thriving due to higher temperatures along with more nutrients in the water associated with feeding fish. The living organisms are therefore emitting more carbon dioxide in a situation of potentially disastrously low oxygen levels . Fish may then die from suffocation. uv maintenance, lamp changes
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
Autumn pond preparation for winter ... Remove fallen leaves. Net pond and stream. Remove tender aquatics. Clean pumps and raise them up to the marginal shelf level so they only circulate surface water. Only feed fish low protein food below water temperatures10C down to 7C. Stop feed altogether at 7C. Maintain a hole in any ice that forms on the surface for more than 3 days. Cleanout any filtration system once the temperature approaches freezing and close it down. Keep the pool topped up especially in areas where there is a high water table. Treat any fresh water with pool conditioning chemicals. all about water garden fountains
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
Oxygen in ponds ... On occasions fish in ponds with no fountains or waterfalls may look listless in winter due to carbon dioxide levels being excessive but the problem quickly sorts itself out when windy and bright weather returns. In summer water can hold much less oxygen and the animal and plant life (algae) is also thriving due to higher temperatures along with more nutrients in the water associated with feeding fish. The living organisms are therefore emitting more carbon dioxide in a situation of potentially disastrously low oxygen levels . Fish may then die from suffocation. uv maintenance, lamp changes
Getting your pond ready for spring and that burst of life .... You can out those marginal plants if they need replanting. No real hurry but get it done before the middle of April. Just empty out the baskets, divide with a knife of spade and replant the portions with healthy growing tips in a good heavy garden loam. Wait a while for the lilies until they are in full growth and the heavier the loam the better for them. Top off with pea shingle. In new ponds they will need a good feed of a slow release pellet each. Keep your eyes peeled for any fish diseases, sores, or things hanging off or on and treat accordingly. water gardens, pond keeping

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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