…—»«
«
—
a
a
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& Magor Âqnamrm Systems
If the environmental factors detailed in the previous chapter afe
carefully considered it can be seen that all of them are common, in
'
varying degree, to ‘all aquatic environments, depending on the required conditions and the nature of the inhabitants. The- aquarist’s
'
objective is to select and manipulate these factors so that he arrives
at a near—perfect solution to a particular problem.
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It is important to realise that in the long run the critical factor
which determi‘nes the success or failureof any aquarium project'is ,
the degree to which the nitrogen cycle is satisfactorily completed,
Other factors such as temperature and illurhination are readily ad—
justable, but the method used to complete the nitrogen cycle isbest
thought out beforehand to suit the type of environment planned,
since once a particular method is adopted it is often difficult to
change to another Without considerable trouble.
'
'
:
,_
outlined in the previous chapter, there
basic “typ.es'_
of nitrogen cycle systems which can be used
Biological
and Sterile — to use current popular,,terminology._ Each system will
*
be described in sOme detail—, together with—the various
_
and‘ diSadvantages, the purpose
of any
cerned and the equipment used
many instances
in which
and
;
another, sometimesbeneficially and sometimes not, and it shOuld be
pointed out that a thoroughexplanation of the
_
should help to avoid incorrect selection and unnecessa‘rydupliCation‘Ï--__
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of both methods
,
…
,
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It is perhaps worth
that the
'
new
environmental methods and the use of
innovations has been accelerated: by the growth of 1nterest1nmarlne '
*
ac‘1uati'cs and the resulting need for :.a more
theÎ fisheî‘s’
requirements than“was, previously undertaken f0riÏt-frâeshwaterfish
_TheiîknoWledge anduderstanding
“_