'
10
__
‘
The Aquatic Environment
—
—_“
Ï-'_l‘his is desirable as it represents thejstates which occur1n
' _
nature. B0th
and acidity can be adjusted'by the aquar1st
by means of chemical additions, and rough measuring methods are
readin available (see p. 135).
'
”
AS mentioned above, tap water should be matured— for a period
time before uSe in a new environment. When an existing env1ron
ment
similar, to the available tap water requires the immediate
addition Of water., usually in an emergency, up
to a 50% change
-
volume is often permissable, providing the temperature of the “*
added water is equaliSed. The minimum mat'uring period
ed for a completely new environment is one week. During this
the dissolved Chlorine will pass
into the atmosphere and the
‘
will age
to a biological condition Which is acceptable to animal andff‘
plant life. Stirring by aeration, and standing foi a further period Will
improve the water even
most of us
not always have.
'
much patience and, except in special cases, for instance
a
.
sensitive fish is to be moved from a long established environment
into the new one, a weekis usually sufficient, providing a container“ Ÿ
with a reasonably large surface area is used. During
period of
maturation the Water…must, of course, be protected from external
'
fouling and other sources of pollution.
.
.
-
RaiWater is probably thepurèst form of natural water when it
starts its journey downwards, but on the way it may pick up all
sorts of constituents from theatmosphere and from any surfaces on
Which it may. fall before being Collected. In industrial atmospheres_‘_
all manner of toxic anduridesirable products may exist and be ' _
.
and treatmenth the-water, even if .it is considered, is
not always possible by ordinary means. To be safe this kind of
water
should not be-'— used. Collecting surfaces for—rainwater should
be free from pollutants, particularly metallic"comp011nds. Rainwater
which is cleariand properly collecteddm a clean, inert surface, Wlll
be soft“ and neutral and ideally suitedto”zrnany freshwater env1ron
ments. lt Will ‘not need a ,maturingperi0d, and in any event will
usually have had“ one in the
container: If it is accessible
birds it should—be
inspect‘èd rÎf.ŒÎ—ÈfiShparasites before usé."
Planted aquaria and such sh…aspthé popular Barbs and, T€tŒ5
usually benefit from theusc Of good ra1nwaterwherethe localtap
water is hard
1tsuse1nspawn1ngtakâ is)nôt ‘
to be
Other natural Wafëï$fmmginland
b'e
gïe_ater °°“œnïmüonthanramwateïandeven1f0hemmall‘/dean
10
__
‘
The Aquatic Environment
—
—_“
Ï-'_l‘his is desirable as it represents thejstates which occur1n
' _
nature. B0th
and acidity can be adjusted'by the aquar1st
by means of chemical additions, and rough measuring methods are
readin available (see p. 135).
'
”
AS mentioned above, tap water should be matured— for a period
time before uSe in a new environment. When an existing env1ron
ment
similar, to the available tap water requires the immediate
addition Of water., usually in an emergency, up
to a 50% change
-
volume is often permissable, providing the temperature of the “*
added water is equaliSed. The minimum mat'uring period
ed for a completely new environment is one week. During this
the dissolved Chlorine will pass
into the atmosphere and the
‘
will age
to a biological condition Which is acceptable to animal andff‘
plant life. Stirring by aeration, and standing foi a further period Will
improve the water even
most of us
not always have.
'
much patience and, except in special cases, for instance
a
.
sensitive fish is to be moved from a long established environment
into the new one, a weekis usually sufficient, providing a container“ Ÿ
with a reasonably large surface area is used. During
period of
maturation the Water…must, of course, be protected from external
'
fouling and other sources of pollution.
.
.
-
RaiWater is probably thepurèst form of natural water when it
starts its journey downwards, but on the way it may pick up all
sorts of constituents from theatmosphere and from any surfaces on
Which it may. fall before being Collected. In industrial atmospheres_‘_
all manner of toxic anduridesirable products may exist and be ' _
.
and treatmenth the-water, even if .it is considered, is
not always possible by ordinary means. To be safe this kind of
water
should not be-'— used. Collecting surfaces for—rainwater should
be free from pollutants, particularly metallic"comp011nds. Rainwater
which is cleariand properly collecteddm a clean, inert surface, Wlll
be soft“ and neutral and ideally suitedto”zrnany freshwater env1ron
ments. lt Will ‘not need a ,maturingperi0d, and in any event will
usually have had“ one in the
container: If it is accessible
birds it should—be
inspect‘èd rÎf.ŒÎ—ÈfiShparasites before usé."
Planted aquaria and such sh…aspthé popular Barbs and, T€tŒ5
usually benefit from theusc Of good ra1nwaterwherethe localtap
water is hard
1tsuse1nspawn1ngtakâ is)nôt ‘
to be
Other natural Wafëï$fmmginland
b'e
gïe_ater °°“œnïmüonthanramwateïandeven1f0hemmall‘/dean