.
âü
.
üeAquatieEnvîroment
..
j
_
_
gets available are little more than
substitùtes' fô‘r simpler
methods which
been available for along time but we‘re never
…
fully understood. By intelligentapplication of simpleequipm&ent,
,_
.
some attention to the total population of an environment’and proper
it should be possible for the average aquarist to keep a
container of water in good biological condition for several years
without any eomplex routine procedures. It should- be remembered -»
that the simplest method consistent with success” will be the most,
reliable and rewardingÇ
The best and most convenient method for
in all types of
environment is probably a biological method involving a sub—gravel
'
filter; The lter itself and its action are described later (p.
but
its advantages
here (see also Table 4). It requires a
minimum of external equipment, no routine maintenance, is in—
_
conspicudus and will function satisfactorily for years. The only'
'
restrictions on its use are in plante”d environments, where plant
_
growth is important to the aqùarist, and in aquaria containing
which
the gravel. The alternative methods, summarised
in
all have advantages in specific
Natural methods
‘ _ :; are a
truer representation of the normal ”environment because
Ÿ of"the
of "animals Îand
With Which the fish
In
wh1chthese Creatures
_
need might
Sterile
p AZ) “are
_
,
_
the best
ensùring the medical condition of
and
maybe considered
a large ‘ specime Or a small group -of a single speti“es such
would in anÿ“e’vent live in total
isolation from other
_
_
__