_
'
EmmersitænHeatù1g
'
'
55
Small diameter, the outer
not much larger than the ‘in— .
c0ming cable. The third type of heater is exible and can be buried
,
in the gravel in a large loop. Heat dispersion is excellent, 'butthé
fact that… the gravel is heated rather than the water may disturb
'
plants and
The main advantage of this type is that it can be
used'safely in crowded fry tanks where the fry are known to burn
'
themselves on exposed glass heaters.
‘
All heaters should be mounted horizontally so that heat transfers'
‘
to the water as fast as possible (Figure 15). This reduces the strain
on
rubber hung and increases the life of the element. HeaterS
should not be moved about While hot and should not be installed in
direct contact with the Walls dr the floor of the container. Glass—
«
enclosed heaters are not usually designed to be buried in the gravel
bed and some have exploded in this situation. The power of the
f
heater is measured in terms of its wattage and this should _bereason—
"
ably mat—ched to the volume of water which is to be heated. If the
wattage is low the heater may
not be capable of the high'emergenc-y
temperatures sometimes required for disease control or maynot be
_
'
able to cope with the extra demands if the ambient temperature
should sûddenly drop. On the other hand, a high powered heatet
,
in a Small volume causes the thermostat to work that much harder
in order to control the temperature properly, and this reducesthe
life of the thermostat and causes excessive heat loss due to cyclig‘
Recommended heater wattages are shown
Table
5.
w
…l
—*«—1
—
”
—'
*
-.«..—,
.
a:”…
_
"."z‘°:°.°‘.ï'ä“."°
—
(a)
'
(b)
…
'
‘
"
Iï- ?.
'
—*
._
'
'
°
f
*I
,
_
,
_
‘
Fig. 15.Correct positioning of heatingequipment in the aquarium.
arrangements. are crossed through (11) and (b)Thefmostat above heater.ln*Case
,
two heaters should be used if the tank is Very lar’ge.“(c)_Thermostat below …
'_ .
.
‘»
heater. (d) Heater buried in ;sa‘nd. (e) and (f) Acombined.heater—thermostat With ,_
_
_
'
the thefmOstat asecti0n, respectively, above and below the heate'r‘;_ (CourteSy'
_
‘
«,
,'
Ltd.)
"'
—
‘
’
"
'
EmmersitænHeatù1g
'
'
55
Small diameter, the outer
not much larger than the ‘in— .
c0ming cable. The third type of heater is exible and can be buried
,
in the gravel in a large loop. Heat dispersion is excellent, 'butthé
fact that… the gravel is heated rather than the water may disturb
'
plants and
The main advantage of this type is that it can be
used'safely in crowded fry tanks where the fry are known to burn
'
themselves on exposed glass heaters.
‘
All heaters should be mounted horizontally so that heat transfers'
‘
to the water as fast as possible (Figure 15). This reduces the strain
on
rubber hung and increases the life of the element. HeaterS
should not be moved about While hot and should not be installed in
direct contact with the Walls dr the floor of the container. Glass—
«
enclosed heaters are not usually designed to be buried in the gravel
bed and some have exploded in this situation. The power of the
f
heater is measured in terms of its wattage and this should _bereason—
"
ably mat—ched to the volume of water which is to be heated. If the
wattage is low the heater may
not be capable of the high'emergenc-y
temperatures sometimes required for disease control or maynot be
_
'
able to cope with the extra demands if the ambient temperature
should sûddenly drop. On the other hand, a high powered heatet
,
in a Small volume causes the thermostat to work that much harder
in order to control the temperature properly, and this reducesthe
life of the thermostat and causes excessive heat loss due to cyclig‘
Recommended heater wattages are shown
Table
5.
w
…l
—*«—1
—
”
—'
*
-.«..—,
.
a:”…
_
"."z‘°:°.°‘.ï'ä“."°
—
(a)
'
(b)
…
'
‘
"
Iï- ?.
'
—*
._
'
'
°
f
*I
,
_
,
_
‘
Fig. 15.Correct positioning of heatingequipment in the aquarium.
arrangements. are crossed through (11) and (b)Thefmostat above heater.ln*Case
,
two heaters should be used if the tank is Very lar’ge.“(c)_Thermostat below …
'_ .
.
‘»
heater. (d) Heater buried in ;sa‘nd. (e) and (f) Acombined.heater—thermostat With ,_
_
_
'
the thefmOstat asecti0n, respectively, above and below the heate'r‘;_ (CourteSy'
_
‘
«,
,'
Ltd.)
"'
—
‘
’
"