convergent upward flow first stage, followed by a divergent downward flow
second stage. The decreasing cross-sectional area of the convergent first stage,
causes great turbulence and extended contact time between the air bubbles
and water. The increasing cross-sectional area of the divergent second stage,
causes the air bubbles to flow both co-and-counter-current before arriving to
the water surface. The combined action of the 2 compartments creates a protein
loaded, stable foam at the throat of the skimmer, positively pushing dry foam
up into the collection cup.
The bubble-trap under the reaction chamber redirects any escaping air bubbles
ensuring that bubble free water is returned to the aquarium via the cascade.
In addition, the bubble-trap acts as a Mechanical filter by trapping small particulate
matter, thus removing it from the water flow.
The Flow Regulator located on the Inlet Pipe allows the skimmer’s performance
to be optimized for all aquarium conditions.
3. Safety
IMPORTANT SAFETY INSTRUCTIONS
WARNING
-
To guard against injury, basic safety precautions should be observed,
including the following.
READ AND FOLLOW ALL SAFETY INSTRUCTIONS
DANGER
-
To avoid possible electric shock, special care should be taken since
water is employed in the use of aquarium equipment. For each of the following
situations, do not attempt repairs yourself; return the appliance to an authorized
service facility for service or discard the appliance.
a. Do not operate any appliance if it has a damaged cord or plug, if it
is malfunctioning, or if it is dropped or damaged in any manner.
b. To avoid the possibility of the
appliance plug or receptacle
getting wet, position aquarium
stand and tank to one side of a
wall mounted receptacle to
prevent water from dripping onto
the receptacle or plug.
A "drip loop" shown in the figure,
should be arranged by the user for
each cord connecting an aquarium
appliance to a receptacle.
The "drip loop" is that part of the
cord below the level of the
receptacle, or the connector.
Use an extension cord if necessary, to prevent water traveling along the
cord and coming into contact with the receptacle. If the plug or receptacle
does get wet,
DON'T
unplug the cord. Disconnect the fuse or circuit
breaker that supplies power to the appliance. Then unplug the device
and examine for presence of water in the receptacle.
c. Close supervision is necessary when any appliance is used by or near
children.
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Aquarium
Power
Cord
Drip Loop
Throat while holding it above a sink.
a. Fix the Prizm (without the Collection Cup) in its desired position with
the Fixing Screw.
b. Pour approx. 2” (5 cm) of aquarium water into the 1st stage of the
Reaction Chamber.
c. Assemble the Collection Cup in position above the Main Body and screw
the Air Plug closed.
d. Set the Flow Regulator on the Inlet Tube to
the half open position. (i.e. 45 degrees to
the Main Body).
e. Plug the power cord of the pump into the
power outlet socket ensuring that the power cord has a drip loop.
f. The Pump will begin to draw water into the Inlet Pipe until all of the air has
been expelled at which point the Reaction Chamber will fill with water.
Thereafter the water will flow back to the aquarium through the cascade
return. This process should take between 20 seconds to 1 minute. If the
Inlet Pipe does not fill with water see Troubleshooting hereafter.
(
Note:
If you have set the flow valve to the fully open position the
Pump will make a rattling noise. This will disappear as soon as you open
the Air Plug as directed below.)
g. If an air pocket remains in the Inlet Pipe, rotate the Flow Regulator
to the closed position. The water flow will reduce and the air will be
sucked into the Reaction Chamber. Return the Flow Regulator to
the open position.
h. Open the Air Plug by rotating anticlockwise until a steady air flow
is injected with the water flow into the reaction chamber, filling
the 1st and 2nd stages of the Reactor with a concentrated air/water
mixture.
(
Note:
the Air Plug should be opened to the point that further
rotation of the Plug does not effect the air/water flow through the
skimmer.) Adjust the Flow as described below.
Once the Inlet Pipe has filled with water (after Priming) it will remain full of
water even if the pump is switched off therefore the Prizm will function
properly as soon as power is restored. In the event that the siphon in the Inlet
Pipe is broken, the Prizm will have to be primed as described above.
Surface Skimmer
- Adjust the height of the Surface Skimmer such that normal
evaporation will not cause the water level in the aquarium to drop below the
level of the strainer. – Err on the side of caution i.e. set the Surface Skimmer
lower than you expect. Setting the Surface Skimmer too high may result in
the water supply to the Prizm being cut off.
8. Flow Adjustment
Initially adjust the Flow with the Flow Regulator so that the water level in the
Throat of the Reaction Chamber is approximately 1” (2.5 cm) below the o-ring
and that there are no air bubbles in the water returning to the aquarium.
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