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Pond
Filtration
Maintaining a healthy pond environment with crystal clear
water usually requires a filtration system. Filtration systems
perform one or several of the following functions:
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Mechanical filtration - particles are trapped in some
type of media for removal during cleaning.
Biological filtration - beneficial bacteria feed on
impurities in the water, breaking down fish waste and other
organic matter.
U.V. Clarification - water is exposed to ultraviolet
light, making suspended particles clump together for removal
by the mechanical filter.
Most filters for mid-size and large ponds employ a combination
of mechanical filtration and biological filtration. They can
accommodate an ultraviolet clarifier as an option.
The plastic "bio-media" contained in a filter chamber
usually has an extremely large surface area to encourage the
growth of beneficial bacteria colonies - the secret to effective
biofiltration. Once the colony of bacteria is established,
it converts ammonia from fish waste and dead organic matter
first into nitrites and later into harmless nitrates and nitrogen,
which help promote plant growth.
Without help, it can take up to seven weeks for a bacteria
colony to grow large enough to be effective. This can be accelerated
through introduction of additional bacteria, available either
in dry or liquid form.
The rate of water flow through the biofilter will have a major
effect on its results. A fast water flow will not allow the
bacteria to clean the water completely and may even dislodge
the bacteria from the media.
Care should be taken when cleaning a biofilter. Mechanical
elements should be rinsed in a separate container of pond
water. The biomedia should not be disturbed enabling the beneficial
bacteria to remain.
Filter designs differ depending on planned placement. Some
small filters are designed for underwater use, usually near
the submersible pump. Other filters are designed for in-ground
use, however, the lid of the filter should be above ground
for easy access, yet the filtration media is situated below
water level, concealed underground. There are also those filters
which are above-ground units.
Filter Size
Selecting a filter for your pond based on pond volume alone
is not enough. You must calculate the "effective volume"
of the pond, which is influenced by various environmental
factors.
Determine if your pond is affected by direct exposure to sunlight,
shallow depth, or climate conditions, and add to the total
volume by the factors listed below:
Average pond water depth less than 2' 6" - add
25%
Pond located in full sunshine - add 25%
Climate
1. Subtropical - add 35%
2. Termperate - add 15%
3. Northern - (no effect)
Fish stock level should not exceed 10" per 100
gallons of filtration.
Contact Information:
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Telephone: 1-888-838-4017 |
Fax: 1-877-878-6813
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Mail Address: Just Liners, Inc.
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P. O. Box 79
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Bogota, TN 38007
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