Sera PrefiX Filter – Auxiliary Prefilter & Biofilter
The sera PrefiX Filter is a versatile, motorless auxiliary aquarium filter designed to expand the filtration capacity of a compatible pump or external canister filter. It adds up to 1.6 liters, or approximately 0.4 US gallons, of additional filter volume through two independently usable media baskets.
Depending on the filter media installed, the PrefiX Filter can be used as a mechanical prefilter for trapping debris, a quick filter for responding to cloudy or polluted water, or an additional biological filter for expanding the capacity of smaller external filters.
Because the PrefiX Filter does not contain its own motor, it must be connected to a compatible aquarium pump or external filter. It uses standard 16/22 mm aquarium hose and can be installed in freshwater or marine aquarium systems.
Key Features
- Expands Filter Capacity: Adds up to 1.6 liters of additional filter-media volume
- Two Media Baskets: Allows mechanical, biological, or specialty media to be arranged according to the aquarium’s needs
- Multiple Filtration Uses: Can function as a prefilter, quick filter, or supplementary biological filter
- Motorless Design: Operates using water flow supplied by a connected pump or external filter
- 16/22 mm Hose Connection: Connects to compatible aquarium filtration equipment using sera 16/22 mm hose
- Freshwater & Marine Use: Suitable for freshwater, planted, brackish, and saltwater aquariums
- Expandable Setup: Multiple PrefiX Filters may be connected in series when additional capacity is required
- Easy Media Access: Provides a convenient location for media that may need frequent cleaning or replacement
Product Information
- Brand: sera
- Product: PrefiX Filter
- Item Number: 32155
- Product Type: Motorless auxiliary aquarium filter
- Maximum Filter Volume: Up to 1.6 liters / approximately 0.4 US gallons
- Media Baskets: Two
- Hose Size: 16/22 mm
- Aquarium Type: Freshwater and marine aquariums
- Power Source: Requires connection to a compatible pump or external filter
Best Used For
- Adding a prefilter to an external canister filter
- Capturing debris before it reaches the main filter
- Increasing biological filtration capacity
- Temporary water polishing after aquarium maintenance
- Responding to cloudy aquarium water
- Protecting expensive biological media from excessive debris
- Expanding smaller external filter systems
- Freshwater community aquariums
- Planted aquariums
- Marine and saltwater aquariums
Three Filtration Options
Mechanical Prefilter
When filled with mechanical filter media, the sera PrefiX Filter can trap fish waste, uneaten food, plant fragments, detritus, and suspended particles before they enter the main external filter.
Using the unit as a prefilter can help keep biological media cleaner and may reduce how frequently the main canister filter needs to be opened for maintenance.
Quick Filter
The PrefiX Filter can also be filled with fine mechanical media for temporary use when aquarium water becomes cloudy or contains additional suspended debris.
This can be useful after substrate cleaning, aquascaping, plant trimming, filter maintenance, or another event that releases particles into the water column.
Supplementary Biological Filter
When filled with high-surface-area biological media, the PrefiX Filter can provide additional space for beneficial bacteria. This may be useful when expanding the filtration capacity of a smaller external filter or supporting a heavily stocked aquarium.
The additional media does not instantly cycle an aquarium. Biological media must be given time to become colonized by beneficial bacteria.
Filter Media Options
The two baskets may be filled with aquarium filter media selected for the system’s specific needs. Suitable options may include:
- Coarse mechanical foam
- Fine filter pads or filter wool
- sera siporax biological filter media
- Activated carbon for temporary chemical filtration
- Phosphate-removing media
- Other compatible granular aquarium filter media
When using fine or loose filter media, sera recommends placing the material inside a compatible sera filter media bag to help keep particles contained.
How to Install
- Turn off and unplug the aquarium pump or external filter.
- Choose an accessible location for the PrefiX Filter.
- Fill the two baskets with the desired filter media.
- Secure fine or loose media inside an appropriate media bag.
- Connect the PrefiX Filter to the pump or external filter using compatible 16/22 mm hose.
- Make sure all hose connections are fully seated and secure.
- Prime the filtration system according to the pump or external filter instructions.
- Restart the system and carefully check every connection for leaks.
The exact hose routing depends on whether the PrefiX Filter is being installed as a prefilter, supplementary filter, or quick filter. Follow the manufacturer’s instructions for the connected pump or external filter.
Connecting to an External Filter
When used as a prefilter, the PrefiX Filter is generally installed in the intake line before water reaches the main external filter. This allows the auxiliary media to capture debris before it enters the canister.
Confirm that the connected external filter is compatible with 16/22 mm hose and that the additional restriction does not reduce water flow below an acceptable level.
Clean mechanical media regularly. A heavily clogged prefilter can restrict the flow of water to the main external filter.
Connecting to an Aquarium Pump
The PrefiX Filter may also be connected to a compatible aquarium pump. The pump provides the water movement required to pull or push water through the filter baskets.
Make sure the selected pump has suitable connections and adequate performance for the intended installation. Actual water flow will be affected by hose length, height, bends, installed media, and the amount of debris trapped in the filter.
Connecting Multiple PrefiX Filters
Multiple sera PrefiX Filters may be connected in series when additional filter volume or separate filtration stages are desired.
For example, one unit may hold mechanical media while a second contains biological or chemical media. Each additional unit can increase resistance, so water flow should be checked after installation.
Avoid adding more filters than the connected pump or external filter can operate effectively.
Maintenance
Inspect the PrefiX Filter regularly and clean the installed media whenever water flow begins to decline or debris becomes visible.
Mechanical media may require frequent rinsing, especially when the unit is being used as a prefilter. Biological media should be cleaned more gently to preserve beneficial bacteria.
For routine biological-media maintenance, rinse the media in water removed from the aquarium during a water change. Do not use soap, bleach, detergent, or household cleaners.
Maintenance Tips
- Turn off the connected pump or external filter before opening the PrefiX Filter
- Close any available hose valves before disconnecting the unit
- Place a towel or shallow container beneath the filter during maintenance
- Clean mechanical media when water flow decreases
- Rinse biological media gently in removed aquarium water
- Do not replace all established biological media at one time
- Inspect hose connections and seals for wear
- Confirm that the filter is securely closed before restarting the system
- Check carefully for leaks after every cleaning
Benefits as a Prefilter
External canister filters can become difficult and time-consuming to clean, particularly when large amounts of solid waste enter the filter. Installing a PrefiX Filter before the main canister creates an accessible first stage for collecting debris.
Because the auxiliary unit can be serviced separately, aquarium keepers may be able to clean mechanical media without disturbing the biological media inside the main external filter.
This arrangement can help maintain water flow, protect biological media from clogging, and simplify routine aquarium maintenance.
Important Aquarium Care Note
The sera PrefiX Filter is motorless and cannot circulate aquarium water by itself. It must be connected to a compatible pump or external filter.
Adding the PrefiX Filter may reduce overall water flow, especially when it is filled with dense media or becomes clogged. Monitor the connected filter’s output and clean the media as needed.
The PrefiX Filter does not replace regular water changes, aquarium cycling, water testing, water conditioning, or proper biological filtration.
Always turn off electrical aquarium equipment before opening hoses or filter components. Check all connections for leaks before leaving the aquarium unattended.
Frequently Asked Questions
What is the sera PrefiX Filter?
It is a motorless auxiliary filter that connects to a compatible aquarium pump or external filter to add mechanical, biological, or chemical filtration capacity.
Does the PrefiX Filter include a motor?
No. Water flow must be supplied by a connected pump or external canister filter.
How much filter capacity does it add?
It adds up to 1.6 liters, or approximately 0.4 US gallons, of filter volume.
How many media baskets does it contain?
The PrefiX Filter contains two variably usable filter baskets.
What hose size does it use?
It connects using 16/22 mm aquarium hose.
Can it be used as a prefilter?
Yes. It can trap debris before the water reaches a connected external filter.
Can it provide biological filtration?
Yes. The baskets may be filled with biological media to expand the aquarium’s filtration capacity.
Can it be used for water polishing?
Yes. Fine mechanical media may be used temporarily to capture suspended particles and cloudiness.
Can more than one PrefiX Filter be connected?
Yes. sera states that multiple units may be connected in series.
Can loose filter media be used?
Yes. sera recommends using compatible filter media bags when installing fine-grained media.
Is it suitable for freshwater aquariums?
Yes. It is suitable for freshwater and planted aquariums.
Can it be used in a saltwater aquarium?
Yes. The PrefiX Filter is suitable for freshwater and marine aquarium systems.
Does it come with filter media?
Filter-media contents may vary by package or retailer. Confirm the included components before purchase and select media appropriate for the intended use.
Will it reduce water flow?
Any additional filter, hose, or media can create resistance. Clean the media regularly and confirm that the connected pump or filter maintains sufficient flow.
How often should it be cleaned?
Cleaning frequency depends on the installed media and aquarium waste load. Clean it whenever debris accumulates or water flow begins to decline.
Available at Tropical Treasures Wyo
The sera PrefiX Filter provides up to 1.6 liters of flexible mechanical, biological, or chemical filtration capacity for compatible aquarium pumps and external filters. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop sera filters, aquarium pumps, filter media, media bags, hoses, canister filters, and aquarium maintenance supplies.
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