8
'
‘
'
The Aquatic Environment
V
.
which is as large as possible. The only situations in which
'
.
containers are useful are" those requiring steriie conditions,
SpaWning egglaying fish, or for isolating single fish or small groups for‘
various reasons, and these arrangements are usually only
,_There are no real biological disadvantages in using a “large container,
…
may
Well be practical reasons such as weight,
space or cost which make it undesirable. However, it is a firm recom.
mendation
the aquarist is toprogress in this hobby in any
‘
manner then all of his permanent aquaria should
"
“lar.ge7asposs‘ible.
ï-.
Water
,
-'
.
'
[The water in any aquarium is obviously fundamental to the whole?
exercise of fishkeepihg and while it is possible to create almost any
kind of environment from whatever water is at hand, it is far better
to give 'the‘matter some thought initially and if at all “possible to.
obtain water which in its original characteristics is as close as
to that required for the particular environment. This preliminary
step will save much time at later stages and will minimise the “need—..
for complicated methods of maintaining the water in its proper
condition.
_
_
'
.
'
There are various kinds of easily available water, including
waters
of various types (these being the most commonly
natural
rain, p0nds, streamS ‘or‘ the sea, andçdistilled'
water from commercialsources (see Table 1). Themajor characteristics which determine“ the nature—of any water areas follows:
salinity,
cleanliness, uriwantèd inclusions
desired omissions. Sea water is anpbvi0‘us" example of a Water of
high salinity. Hard waters
of chalkand
areas. while soft waters ”occur in regions Where rocks such as
granite are found; Hard Waters contain dissolved calcium
bonate (chalk) and are generally alkaline
soft waters-dCv,—Il©fr
and are generally acid.'
.
;
'
Tap water as drawn fronithe
a-periddÿoft1meto
‘mature’ before it can be uSed
completely new
Not only is it too pure for“ bi-ol‘0gical purposes; butlsalsocontams
dissolved chlorine as an unwantéd
Wlllharmthe
'
fish. Water from
supply
mayalsg
Contain copper particlesg:
must ‘.«be
since even very small-concentrations of_co'ppericanbelethaltsh
and other
sense,
'
‘
'
The Aquatic Environment
V
.
which is as large as possible. The only situations in which
'
.
containers are useful are" those requiring steriie conditions,
SpaWning egglaying fish, or for isolating single fish or small groups for‘
various reasons, and these arrangements are usually only
,_There are no real biological disadvantages in using a “large container,
…
may
Well be practical reasons such as weight,
space or cost which make it undesirable. However, it is a firm recom.
mendation
the aquarist is toprogress in this hobby in any
‘
manner then all of his permanent aquaria should
"
“lar.ge7asposs‘ible.
ï-.
Water
,
-'
.
'
[The water in any aquarium is obviously fundamental to the whole?
exercise of fishkeepihg and while it is possible to create almost any
kind of environment from whatever water is at hand, it is far better
to give 'the‘matter some thought initially and if at all “possible to.
obtain water which in its original characteristics is as close as
to that required for the particular environment. This preliminary
step will save much time at later stages and will minimise the “need—..
for complicated methods of maintaining the water in its proper
condition.
_
_
'
.
'
There are various kinds of easily available water, including
waters
of various types (these being the most commonly
natural
rain, p0nds, streamS ‘or‘ the sea, andçdistilled'
water from commercialsources (see Table 1). Themajor characteristics which determine“ the nature—of any water areas follows:
salinity,
cleanliness, uriwantèd inclusions
desired omissions. Sea water is anpbvi0‘us" example of a Water of
high salinity. Hard waters
of chalkand
areas. while soft waters ”occur in regions Where rocks such as
granite are found; Hard Waters contain dissolved calcium
bonate (chalk) and are generally alkaline
soft waters-dCv,—Il©fr
and are generally acid.'
.
;
'
Tap water as drawn fronithe
a-periddÿoft1meto
‘mature’ before it can be uSed
completely new
Not only is it too pure for“ bi-ol‘0gical purposes; butlsalsocontams
dissolved chlorine as an unwantéd
Wlllharmthe
'
fish. Water from
supply
mayalsg
Contain copper particlesg:
must ‘.«be
since even very small-concentrations of_co'ppericanbelethaltsh
and other
sense,