__
_
‘
—_
\
“
‘
‘
;
_
‘
Light
_Ÿ
_
.
'
"*
"
19
? if the plant food around the
is poor.ln_ the—meantime,
in the absence of any regulating inuences, algal growth is promoted
.
by the“ bright spring sunshine and _develops quickly,
available surfaces and eventüally appearing as
The pond then has that‘familiar fpea-soup’ consistencyand
ancè. With the coming of “late spring and“ earlysummer the fishes …î;1_
have their breeding period and are very active, producing
…,,“al
waSte, while daylight and temperature increase and finally the?
.
rooted plants appear from the deeps in search of light. The
now go into a decline and a balance is created whereby the major
__
plants fill all the space theyi:an reach and the algae grow strongly
only in the remaining spaces. This situation continues through the. "
summer with a decrease in algal growth as the major plants develop
further. Through0ut thisperiod the water is clear and only surface—
fixed algae is noticeable. In the autumn
starts to
:
rot
down or just stops groWing, ready for the next year. The ..
whole of this amazingpycle …is controlled by seasonal changesin
daylight with only minor variations due to other envirc‘>nmental
;
factors.
_
-
'
'
‘
_It is clear from the example of the fish—pond that we
_…_
to reproduceand stabilise in ourfreshwater planted environmehts
that summer period of. luxurious plant growth coupled with clear
'?
water and minimal algal population. The main requirements are
plenty of light both in terms of “intensity and duration, high
temperatures and,süfficien—t‘well—fed plant growth initially…to ensure
?
domination
point”is…usually the one
most
to start Withavirtu- _
ly steril€,
b aise medium; : oftènwith—
,
1
_
such as a
filter, and only to install a bare
f _[ _
growto fill:the container in
«is a. great ‘rhistake,becaüse if the environment does
_
not initially have sufficient plant life installed in a suitable feeding
base medium strong algal growth will flour‘ish and will domihate the
the higher plants. The environment will then be a simulation of
‘
the spring condition rather than the summer period and may not
progress as it does in nature.
«
Further discussion of the detailed requirements of plant life is
inappropriate at this point but it must be emphasised that a sufcient
—
number of good healthy plants supplied with adequate base food
must be installed initially as the proper
conditions can rarely develop
quickly if the usually recommend setting—up procedures are followed.
”It is not unusual in good conditions for a 36-in. aquarium, 15-in._
\
l
\
,
.
_
‘
—_
\
“
‘
‘
;
_
‘
Light
_Ÿ
_
.
'
"*
"
19
? if the plant food around the
is poor.ln_ the—meantime,
in the absence of any regulating inuences, algal growth is promoted
.
by the“ bright spring sunshine and _develops quickly,
available surfaces and eventüally appearing as
The pond then has that‘familiar fpea-soup’ consistencyand
ancè. With the coming of “late spring and“ earlysummer the fishes …î;1_
have their breeding period and are very active, producing
…,,“al
waSte, while daylight and temperature increase and finally the?
.
rooted plants appear from the deeps in search of light. The
now go into a decline and a balance is created whereby the major
__
plants fill all the space theyi:an reach and the algae grow strongly
only in the remaining spaces. This situation continues through the. "
summer with a decrease in algal growth as the major plants develop
further. Through0ut thisperiod the water is clear and only surface—
fixed algae is noticeable. In the autumn
starts to
:
rot
down or just stops groWing, ready for the next year. The ..
whole of this amazingpycle …is controlled by seasonal changesin
daylight with only minor variations due to other envirc‘>nmental
;
factors.
_
-
'
'
‘
_It is clear from the example of the fish—pond that we
_…_
to reproduceand stabilise in ourfreshwater planted environmehts
that summer period of. luxurious plant growth coupled with clear
'?
water and minimal algal population. The main requirements are
plenty of light both in terms of “intensity and duration, high
temperatures and,süfficien—t‘well—fed plant growth initially…to ensure
?
domination
point”is…usually the one
most
to start Withavirtu- _
ly steril€,
b aise medium; : oftènwith—
,
1
_
such as a
filter, and only to install a bare
f _[ _
growto fill:the container in
«is a. great ‘rhistake,becaüse if the environment does
_
not initially have sufficient plant life installed in a suitable feeding
base medium strong algal growth will flour‘ish and will domihate the
the higher plants. The environment will then be a simulation of
‘
the spring condition rather than the summer period and may not
progress as it does in nature.
«
Further discussion of the detailed requirements of plant life is
inappropriate at this point but it must be emphasised that a sufcient
—
number of good healthy plants supplied with adequate base food
must be installed initially as the proper
conditions can rarely develop
quickly if the usually recommend setting—up procedures are followed.
”It is not unusual in good conditions for a 36-in. aquarium, 15-in._
\
l
\
,
.