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Water Gardening Introduction To
Pond Keeping Part 1
When a person builds a
pond it is to achieve the vision of
crystal clear water. The vision normally includes a pond full
of colourful fish and attractive aquatic plants.
Often the reality of a pond is something quite different ...
a green smelly hole in the ground. This need not be the case.
This article identifies the really important factors that
will result in a beautiful pond, something to be proud of and
which the family can enjoy. Something to add value to your home
and lifestyle.
Before you dig the hole do understand that if you intend to
keep fish then a biofilter must be installed. A biofilter
can be a fairly simple box shaped container with a suitable
biomedia inside it onto which bacteria can accumulate so that
they can do the job of purifying the pond water day in and day
out.
The job of the biofilter is to purify the water first and
foremost. Fish excrete ammonia which if allowed to build up
results in the fish poisoning themselves ..... remember those
goldfish in the bowl which lasted about a week ... they died
because there was no biofilter to purify the water. The fish
poisoned themselves to death in simple terms.
The biofilter's secondary job is to remove solids. Many
people believe its job is to remove solids as its most
important function ... not so.
The best biofilter
medium by far for conventional box-type
biofilters is Alfagrog, a porous ceramic medium specially made
for purifying fish ponds. Many people use plastic tubes, hair
curlers, plastic coke bottle tops and the like. Be aware that
these media need to be used in quite large quantities to be
effective at holding sufficient bacteria to ensure clean
(biologically speaking) water. You will need 40 times the
volume of plastic tubes as Alfagrog to achieve the same
biofilter capacity.
If you want to save money and reduce dramatically the risk
of pond infections and fish disease do NOT use a sand filter
for a pond. They are great for swimming pools, and bad for
ponds.
If you want to ensure your pond always stays crystal clear
then an ultraviolet light must also be installed since without
this the risk of a pea-soup coloured water developing is great.
Fish and biofilter bacteria need large amounts of oxygen to
survive so a reliable pond pump which will operate 24 hours per
day every day must be obtained. A biofilter even the very best
(vortex type biofilters are the best but are difficult to
install and are only necessary on large sophisticated koi
ponds)
Once upon a time all ponds were concrete. Today unless you
wish to have a very large or special pond concrete is NOT the
material to use. It is simpler, cheaper, better and quicker to
use pre-formed ponds ideally made from fibreglass in natural
rock finishes with matching waterfalls or streams. If you want
a pond whose volume is larger than about 500 litres then it is
best and most economical to use a black plastic liner designed
specifically for pond building.
So you can already see
that a pond is not just a hole in the ground you casually dig one
day and then hope it will add value to your life. Without care and
knowledge that hole in the ground will cost an arm and a leg and
will not please you. Unless you go out of your way to learn the
really important parts of pond keeping then do not even dig the
hole......... it will not be worth it.
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