Dead leaves, food remains, pollen, dead plant bits, fish excrement and so
on sink to the bottom of the pond. Although the ever-present
micro-organisms in a pond decompose this Silt, they cannot cope with the
amount. The result is mud, that extracts oxygen from the water but
enhances algae growth in spring immensely.
The lack of oxygen causes the development of toxic gases. Especially in
winter under a closed layer of ice the fish suffocate together with other
living organisms in the pond. In spring the underwater "muck heap" and the
superfluous nutrients contained within will cause the before mentioned
increased algae growth which doesn't leave a chance for the pond plants.
has to be done?
The sludge must come out of the pond. That sounds easy but it is much
harder than cleaning the living room carpet. Even the best pond vacuum
cleaner cannot remove every trace of silt from a pond. The rest must be
decomposed by "Japanese". These are specially bred micro-organisms. OASE
aqua activ "Ground
Clear" contains these "Japanese" bacteria. They work as an addition
to a pond vacuum cleaner and reduce the level of silt significantly.
the bottom of the pond stay clean?
Only if these bacteria are used regularly and the rest of the silt is
removed by a suitable device such as the
Pondovac pond vacuum
Even the most efficient "Japanese" cannot live without oxygen. The bottom
of the pond provides next to no oxygen. Therefore it is recommended to add
OASE aqua activ "Oxygen
Stabiliser" from the OASE pond treatment range. This product gets
straight to where it is needed: to the bottom of the pond! An additional
effect of this product is that phosphate, the stuff algae are made out of,
is turned into calcium phosphate which in turn will not be suitable as
fertiliser for the algae anymore.
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