’
—
_f
‘
‘
Ÿ
HéatingiEqüi‘grîent
f
53
”
tions… Where “an
inhabited by fishes which livé“nèan
.
the bottom and
with each other for territ—oiries it willÎb’e
found that in'deep water these territories do not“”exterid to the“
surface, but Stop at
in mid—water Which corresponds
to
the requirements of the fish in possession of that particular
volume° lf the numberbf fish present is greater than the
.
_
available territories on the bottom, then in a deep aquarium the
weaker fishes can find some refuge by moving to the upper
waters
which are not claimed by the strong fishes. Thus, i—n ad'eep container,
fishes driven out of possessed territories alWays have somewhere {
,
else to go, whereas if the environment is only one territory deep an
expelled fish mus“t blunder into yet another poésessed territory and
suffer again. A fish which normally lives near the bottom, however,
should
made to… live permanently in
upper
waters when
_
no other more suitable accommodation is available.
Deep water also gives security and a better appearance to laterally -
compressed fishes such asAngels and Disons. Tall plants and vertical
'…
arrangements can “be set up
to‘ give a background which
the È
fishes’. camouflage patterns and their way of life. Similarly, in‘,
community situations, populations of mixed fishes share the envir0n4
better if the water is deep enough to enable-individuals to’
inhabit the level at which they normally live in nature, so that they
«
are not crowded together within, say, a depth of twelve inches.
'
,
«
..HEATING EQUIPMENT
ln —tr0pical aquaria, in which the required temperature isaboVe the
f
pr‘evailing ambient temperature, some… form« of artificial…=“ïheati{n‘zg_Ï
muSt be used together
Control,—system which'îrïnailntainsthç
temperature within certain
NoWadays, artificial
‘
carried out most cleanly and convenien—tly by
As these are the
common they will be _dealt«
with msome
detailand other systems willbe discussedlater.
«
'
_
-
Inany installation which involves more than just
,
heat—ing cos—ts are an important
in, the
bUdg€t,50
to
…
conservation— of heat-and propertemperaturecon
trol is
In the home,
the aquarium is
a lounge, and" in this situation heat lbsses
.
so important, since they add—to the warmth Âo;f…the roomlnfact,a "
—
_f
‘
‘
Ÿ
HéatingiEqüi‘grîent
f
53
”
tions… Where “an
inhabited by fishes which livé“nèan
.
the bottom and
with each other for territ—oiries it willÎb’e
found that in'deep water these territories do not“”exterid to the“
surface, but Stop at
in mid—water Which corresponds
to
the requirements of the fish in possession of that particular
volume° lf the numberbf fish present is greater than the
.
_
available territories on the bottom, then in a deep aquarium the
weaker fishes can find some refuge by moving to the upper
waters
which are not claimed by the strong fishes. Thus, i—n ad'eep container,
fishes driven out of possessed territories alWays have somewhere {
,
else to go, whereas if the environment is only one territory deep an
expelled fish mus“t blunder into yet another poésessed territory and
suffer again. A fish which normally lives near the bottom, however,
should
made to… live permanently in
upper
waters when
_
no other more suitable accommodation is available.
Deep water also gives security and a better appearance to laterally -
compressed fishes such asAngels and Disons. Tall plants and vertical
'…
arrangements can “be set up
to‘ give a background which
the È
fishes’. camouflage patterns and their way of life. Similarly, in‘,
community situations, populations of mixed fishes share the envir0n4
better if the water is deep enough to enable-individuals to’
inhabit the level at which they normally live in nature, so that they
«
are not crowded together within, say, a depth of twelve inches.
'
,
«
..HEATING EQUIPMENT
ln —tr0pical aquaria, in which the required temperature isaboVe the
f
pr‘evailing ambient temperature, some… form« of artificial…=“ïheati{n‘zg_Ï
muSt be used together
Control,—system which'îrïnailntainsthç
temperature within certain
NoWadays, artificial
‘
carried out most cleanly and convenien—tly by
As these are the
common they will be _dealt«
with msome
detailand other systems willbe discussedlater.
«
'
_
-
Inany installation which involves more than just
,
heat—ing cos—ts are an important
in, the
bUdg€t,50
to
…
conservation— of heat-and propertemperaturecon
trol is
In the home,
the aquarium is
a lounge, and" in this situation heat lbsses
.
so important, since they add—to the warmth Âo;f…the roomlnfact,a "