Sera Internal Filter L 150 Air Operated Sponge Filter

The Sera Internal Filter L150 is an air-operated sponge filter designed for gentle mechanical and biological filtration in freshwater aquariums. This internal filter works using an air pump and airline tubing, creating an airlift effect that moves aquarium water through the sponge media.

As water passes through the fine mesh sponge, debris is trapped while beneficial nitrifying bacteria colonize the sponge surface. This helps support biological filtration and pollutant breakdown in the aquarium. The gentle flow makes the Sera Internal Filter L especially useful for breeding tanks, fry tanks, shrimp tanks, quarantine setups, and aquariums with delicate or small fish.

Key Features

• Air-operated internal sponge filter
• Uses airlift movement powered by an aquarium air pump
• Provides gentle mechanical and biological filtration
• Fine mesh sponge helps trap debris
• Optimized sponge surface supports beneficial bacteria growth
• Ideal for larvae, juvenile fish, fry, shrimp, and delicate livestock
• Great for breeding tanks, rearing tanks, and low-flow aquariums

Great For

• Freshwater aquariums
• Breeding tanks
• Fry grow-out tanks
• Larvae and juvenile fish rearing
• Shrimp tanks
• Quarantine tanks
• Hospital tanks
• Low-flow aquarium setups

How It Works

The Sera Internal Filter L150 operates as a mammoth or airlift pump. Air from an aquarium air pump is pushed into the standpipe through airline tubing. As the air rises, it draws aquarium water upward. The water then flows back through the fine sponge media, where debris is captured and beneficial bacteria can help support biological filtration.

Why Use an Air-Operated Sponge Filter?

Air-operated sponge filters are popular because they provide gentle filtration without strong suction. This makes them ideal for small fish, fry, larvae, shrimp, and other delicate aquarium inhabitants that may be at risk with standard filter intakes.

The sponge also provides an excellent surface for beneficial bacteria, helping support stable aquarium water quality when used as part of regular aquarium maintenance.

How to Use

• Attach airline tubing to the filter connection.
• Connect the airline tubing to a compatible aquarium air pump.
• Place the internal filter inside the aquarium.
• Use a check valve to help prevent water from back-siphoning into the air pump.
• Keep the filter running continuously for stable filtration.

Maintenance Tips

• Clean the sponge when water flow becomes reduced.
• Rinse the sponge gently in removed aquarium water during water changes.
• Avoid rinsing sponge media under untreated tap water, as this may harm beneficial bacteria.
• Do not replace all biological media at once in an established aquarium.
• Use an appropriately sized air pump for best performance.

Product Details

• Brand: Sera
• Product: Internal Filter L150
• Product Type: Air-operated internal sponge filter
• Filtration Type: Mechanical and biological
• Operation: Air pump powered airlift filtration
• Use: Freshwater aquarium filtration
• Best For: Fry, juvenile fish, shrimp, breeding tanks, and low-flow setups
• Requires: Aquarium air pump and airline tubing, sold separately unless otherwise stated

Frequently Asked Questions

What is the Sera Internal Filter L used for?

The Sera Internal Filter L is used for gentle mechanical and biological filtration in freshwater aquariums. It is especially useful for breeding tanks, fry tanks, shrimp tanks, and low-flow setups.

Does the Sera Internal Filter L need an air pump?

Yes. This filter is air-operated and requires a compatible aquarium air pump and airline tubing to function.

Is this filter safe for fry and juvenile fish?

Yes. The gentle sponge filtration makes it a great option for larvae, juvenile fish, fry, and small aquarium inhabitants that may be pulled into stronger filters.

Does this filter provide biological filtration?

Yes. The sponge media provides surface area for beneficial nitrifying bacteria, which help support biological filtration and pollutant breakdown in the aquarium.

How do I clean the sponge?

During a water change, gently rinse or squeeze the sponge in removed aquarium water. Avoid cleaning it with untreated tap water, as this may reduce beneficial bacteria.

Can this be used in shrimp tanks?

Yes. Air-operated sponge filters are commonly used in shrimp tanks because they provide gentle filtration and help prevent shrimp from being pulled into the filter intake.

Can this be used as the main filter?

Yes, in many breeding tanks, shrimp tanks, quarantine tanks, and low-flow freshwater setups, a properly sized sponge filter can be used as the main filter. Stocking level, feeding, and maintenance routine should always be considered.

Shop Sera Internal Filters at Tropical Treasures Wyo

The Sera Internal Filter L is a gentle air-operated sponge filter for freshwater aquariums, breeding tanks, fry grow-out tanks, shrimp tanks, and low-flow setups. Shop Sera aquarium filters, air pumps, airline tubing, check valves, sponge filters, and aquarium supplies at Tropical Treasures Wyo in Cheyenne, Wyoming.

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