NO WATER CIRCULATION
1. Check power supply and confirm return
pump is plugged in.
2. No water in filter unit, add water to
maximum water level indicator.
3. Check Overflow Box to confirm water is
flowing.
4. Check the Pre Filter at the front of the
Overflow Box and clean if needed.
LARGE AMOUNT OF
BUBBLES ARE BEING
PUMPED BACK INTO TANK
1. Check water level in the filter unit, add water
if needed.
2. Check Overflow Box for obstacles.
3. Check Hosing and Tubing for kinks or
obstructions.
4. If using air stones or power heads with
venturi installed, position away from Overflow
Box inlet.
RETURN WATER FLOW IS
SLUGGISH.
1. Check Overflow Hosing or return Hosing for
kinks; straighten Hosing and/or tubing if
needed.
2. Check for obstructions in Overflow Box or
inlet of Power Head.
3. Check the power head.
WATER LEAKING AT
FLEXIBLE HOSING
CONNECTIONS
1. Disconnect Flexible Hoses from connectors
on the filter unit and Overflow Box and clean
connectors thoroughly with an Aqua One
Double Ended Pipe Brush. Reconnect and
tighten hose clamps snugly.
2. If the Flexible Hosing has slipped from
original position, remove and clean area, then
reconnect and tighten hose clamps snugly.
OVERFLOW BOX NOT
FUNCTIONING
1. Check power supply and confirm Priming
Pump is plugged in.
2. No water in Overflow Box, add water.
3. Check Overflow Box for obstacles.
4. Check Hosing and Tubing for kinks or
obstructions.
PRIMING PUMP NOT RUNNING
1. Check power supply and confirm Priming
Pump is plugged in.
2. Ensure the airline is correctly inserted into
the red ports on the Priming Pump. Arrow in is
water in from the V-Joint on the Water bridge.
3. Open Priming Pump Housing and confirm
diaphragm is moving.
4. Replace Priming Pump Diaphragm and
Flappers with new rebuilt kit.
PRIMING PUMP RUNNING BUT
WATER FLOW IS MINIMAL
1. Possible clogged airline, remove airline
tubing and run under hot water through or
replace and reinstall.
2. Replace Priming Pump Diaphragm and
Flappers with new rebuilt kit.
WATER LEVEL IN FILTER BOX
TO HIGH
1. Raise height of Overflow Box by turning
height Adjusting Screws clockwise.
2. Raise height of Overflow Box by adjusting
the Water Level Adjuster.
3. Remove some water from aquarium.
Trouble Shooting
8
