
UNDERWATER FILTERS
FILTRES INTÉRIEURS
for Fresh and Saltwater Aquariums
pour aquariums d’eau douce
ou d’eau de mer
Printed in Italy / Imprimé en Italie
Distributed by:
CANADA: Rolf C. Hagen Inc., Montreal (QC) H4R 1E8
U.S.A.: Rolf C. Hagen (U.S.A.) Corp., Mansfield, MA 02048
U.K.: Rolf C. Hagen (U.K.) Ltd., Castleford, W. Yorkshhire WF10 5QH
FRANCE: Rolf C. Hagen (France) SA., F-77388, Combs la Ville

IMPORTANT SAFEGUARDS
WARNING-To guard against injury, basic safety precautions should be observed including the following:
READ AND FOLLOW ALL SAFETY
INSTRUCTIONS
1. DANGER-T o avoid possible electric shock, special
care should be taken since water is employed in the
use of aquarium equipment. Follow these safety
instructions carefully.
2. All aquarium appliances must be disconnected
from the mains power supply before servicing an
aquarium or conducting any activity that allows
direct contact with the water.
WARNING: Disconnect the power from all aquarium
appliances before putting hands into the aquarium.
WARNING: If the appliance falls into the water DO
NOT reach for it! First unplug it, then retrieve it. If
electrical components of the appliance get wet,
unplug the appliance immediately.
3. Do not operate any aquarium appliance, which
malfunctions or is damaged in any way. The power
cord of this appliance cannot be replaced; if the electrical cord or plug is damaged, discard the appliance.
4. WARNING: The motor has no user serviceable
parts. Do not attempt repairs yourself; return the
appliance to an authorized service facility for service
or discard the appliance.
5. To avoid the possibility of the appliance or socket getting wet, position the aquarium to one side of
a wall-mounted socket preventing water dripping
onto the socket or plug.
6. WARNING: Use a drip loop. A “drip loop” (see
illustration) should be arranged by the user for each
cord connecting an aquarium appliance to a socket.
The “drip loop” is that part of the electrical cord
below the level of the socket or the connector if an
1

extension cord is used to prevent
water from traveling along the
cord and coming in contact with
the socket.
If the plug or socket does get wet,
DO NOT unplug the cord.
Disconnect the fuse or circuit breaker that supplies power to the appliance. Then unplug and examine for
the presence of water in the socket.
7. WARNING: To prevent electric shock, supply
electrical power through a wall mounted Residual
Current Device (GFI-Ground Fault Current
Interrupter) with a residual operating current not
exceeding 30mA. If the appliance shows any sign of
current leakage or if the GFI switches off, disconnect
the power supply from mains and remove the appliance from the water.
8. WARNING: Do not permit children to use this
appliance unless they are closely supervised by an
adult at all times.
9. WARNING: Do not use an appliance for other than
its intended use. The use of attachments not recommended or sold by the appliance manufacturer may
cause an unsafe condition.
10. WARNING: Do not immerse this appliance deeper than 1 meter or 40 inches.
11. WARNING: Do not operate this appliance out of
water.
Always unplug an appliance when not in use, before
putting on or taking off parts, and before cleaning.
Never yank cord to pull plug from socket. Grasp the
plug and pull to disconnect.
12. Do not install or store the appliance where it will
be exposed to the weather or to temperatures below
freezing.
13. Make sure the appliance is securely installed
before operating it.
2

14. Read and observe all the important notices on the
appliance.
15. If an extension cord is necessary, an electrical
cord with a proper rating should be used. An electrical cord rated for less amperes or watts than the
appliance rating may overheat. Care should be taken
to arrange the cord so that it will not be tripped over
or pulled.
16. SAVE THESE INSTRUCTIONS
INSTALLATION and OPERATION
See illustrations on pages 15-17.
CAUTION: Disconnect the electrical plug of all appliances
inside the aquarium before putting hands into the water.
Fluval 1 Plus
It is recommended that the foam pad is rinsed before the
first installation.
1. Remove the filter motor from the filter casing. (A)
2. Insert the suction cup into the slot directly below the
electrical cord adjacent to the magnetic impeller. (B)
3. Put the filter motor back on the filter case. (C)
4. Insert second suction cup into the keyhole near the
bottom of the filter case. (D)
5. Place the filter in the aquarium using the suction cups,
ensuring that the horizontal water outlet is at a minimum of 1 cm below the water surface. (E)
6. Plug into power source. (F)
Fluval 2, 3, 4 Plus
It is recommended that the foam pads are rinsed before the
first installation.
1. Attach suction cups to the suction cup bracket. (A)
2. Slide the Hose Adapter/Airflow Control Venturi Nozzle
AquaClear AquaClear

into the water outlet on the filter, making sure that the
hole is facing up. (B)
Note: If the adapter is to be used as a hose adapter or if the
unit is to be used at the bottom of an aquarium, the Airflow
Control Venturi Nozzle hole should be blocked with the
attached stopper. This will ensure maximum water flow.
(See B.2)
3. Push the airflow control device /venturi valve into the
top of the nozzle. (C)
4. Slide the suction cup bracket onto the rear of the filter
and hold it in place while attaching the filter to the
inside of the aquarium. (D)
5. Ensure the outlet is at a minimum of 1 cm below the
aquarium’s water surface. (See D.2)
Note: In order to have the airflow control device/venturi
valve work properly, it must remain above water. Turning the
valve located on the top of the airflow control device/venturi
valve will regulate the quantity of air produced. (See D.3)
6. Plug into power source. (E)
Adjust the water jet direction by moving the horizontal
water outlet from side to side. (F) Adjust the water flow
rate by moving the waterflow adjuster from + to – (G)
Fluval models 2, 3 and 4 Plus have a clogging indicator feature. The yellow clogging indicator is located on the top of
the filter. The device will retract when the filtering media is
clogged.
Caution: This device is directly influenced by the position of
the water flow adjuster and by the accessories installed on
the horizontal water outlet. A correct indication is only possible when the water flow adjuster is set to “maximum” and
no accessories are connected to the horizontal water outlet.
FILTER MAINTENANCE
CAUTION: Disconnect the electrical plug of all appliances
inside the aquarium before putting hands in the water.
We recommend cleaning the magnetic impeller and
impeller well (where the magnetic impeller is located) at
least once every two months. It’s a good idea to clean the
motor when servicing the filter media.
AquaClear AquaClear

WARRANTY REGISTRATION CARD / FICHE DE GARANTIE
RETURN TO VALIDATE YOUR GUARANTEE / À RETOURNER POUR VALIDER VOTRE GARANTIE
NOM
ADRESSE
VILLE PROVINCE CODE POSTAL
TÉL. ÂGE SEXE
DATE DE L’ACHAT MAGASIN
VILLE PROVINCE
S’AGIT-IL D’UN CADEAU? OUI NON
VOLUME DE L’AQUARIUM ESPÈCE(S) DE POISSONS
CHECK PRODUCT PURCHASED / COCHER LE PRODUIT ACHETÉ
CANADA
FLUVAL 1 PLUS (A-160)
FLUVAL 2 PLUS (A-165)
FLUVAL 3 PLUS (A-170)
FLUVAL 4 PLUS (A-175)
Rolf C. Hagen inc., 3225, rue Sartelon, Montréal (Québec) H4R 1E3
NAME
ADDRESS
CITY
TEL.
AGE
POSTAL CODE
GENDER
DATE PURCHASED
STORE
CITY
WAS THIS A GIFT?
YES
NO
AQUARIUM SIZE
TYPE(S) OF FISH

5
Fluval 1 Plus
1. Slowly remove the filter from the aquarium, keeping
the filter in a vertical position to avoid releasing the
debris collected inside the debris reservoir. (A)
2. Remove the filter case bottom and remove the foam
pad. (B)
3. Rinse the foam pad in water taken from the aquarium.
Note: Do not rinse the foam pad directly in the aquarium.
Transfer a small quantity of water from the aquarium into a
bucket. After rinsing, put the foam back in the filter case and
replace filter case bottom. (See C)
4. Separate the motor from the filter housing. (D)
5. Grasp the blades of the impeller fan and pull out the
impeller. (E)
6. Rinse off any slimy buildup that has accumulated on
the magnetic impeller and in the impeller well. (F)
7. Reassemble the filter and install in the aquarium.
(G) (See installation instructions)
Fluval 2, 3, 4 Plus
1. Slowly slide the filter out of the suction cup
bracket, keeping it in a vertical position to avoid
releasing the debris collected inside the debris reservoir. (A)
2. Separate the filter body from the motor by squeezing
the two release arms on the side of the filter body. (B)
3. Gently pull the filter media cartridge out of the filter
body by holding the filter cartridge as indicated in
illustration. (C)
4. Open the two halves of the filter cartridge. (D)
5. Remove the two foam pads. (E)
6. Rinse the foam pads in water taken from the aquari-
um.
Note: Do not rinse the foam pads directly in the aquarium.
Transfer a small quantity of water from the aquarium into a
bucket. After rinsing, put the foam back in the filter case.
(See F)
When replacing the filter foams be sure to carefully
place them under the retaining tabs. (G)
7. Grasp the blades of the impeller fan and pull out the
impeller. (H) Rinse off any slimy buildup that has
accumulated on the magnetic impeller and in the
impeller well. (I)
Reassemble the filter and install in the aquarium.
(See installation instructions)
(J)

GUARANTEE
FLUVAL 1, 2, 3, 4 PLUS UNDERWATER FILTERS are unconditionally guaranteed for a period of 2 years. This guarantee is
valid only under normal operating conditions for which the filters are intended. This guarantee will not apply to any unit subjected to improper use, negligence or tampering. This guarantee
does not include any responsibility for animate material contained in the aquarium and is limited to the FLUVAL UNDERWATER FILTERS only. The motor is factory sealed, tampering
will void guarantee.
SERVICE
If you have a problem or question about the operation of this product, please let us try to help you before you return the product to
your dealer. Most problems can be handled promptly with a phone
call. When you call (or write), please have all relevant information
such as model number and/or part numbers available, as well as the
nature of the problem. Call our Customer Service Department:
Canada Only: Toll-Free Number 1-800-55HAGEN
(1-800-554-2436)
Between 9:00 AM and 5:00 PM Eastern Time.
U.S. Only: Toll-Free Number 1-800-724-2436
Between 9:00 AM and 5:00 PM Eastern Time.
U.K. Only: Helpline Number 01977 556622
Between 9:00 AM and 5:00 PM.
For Authorized Warranty Repair Service:
Return unit with dated receipt and reason for return to:
Canada Rolf C. Hagen Inc.
3225 Sartelon St., Montreal, Quebec, H4R 1E8
U.S. Rolf C. Hagen (USA) Corp.
50 Hampden Road, Mansfield, Ma. 02048-9107
U.K. Rolf C. Hagen (UK) Ltd.
California Dr., Whitwood Ind. Est., Castleford,
West Yorkshire WF10-5QH
To register your warranty on line or for more information on
this and other products go to
www.hagen.com.
6