iWhale Mini Sponge Filter with Foam, Air Stone & Suction Cup – Safe Bio-Filtration for Small Tanks up to 18.93L

Perfect for Small Aquarium Owners, NZ Betta Keepers, Shrimp Tanks, Nano Tank Hobbyists & Breeding Setups

The iWhale Mini Sponge Filter is ideal for New Zealand fishkeepers who maintain nano aquariums, betta tanks, shrimp colonies, fry grow-out setups, or any small tank up to 18.93 litres. This filter is perfect for people who require gentle, low-flow filtration that protects delicate species from being sucked into high-power filters. It suits beginners setting up their first aquarium, experienced aquarists managing multiple tanks, and anyone who wants safe, biologically stable water without complicated equipment.

Designed for quiet NZ homes, office desks, classrooms, bedroom tanks, dorm setups, and compact apartment aquariums, this sponge filter delivers clean, oxygen-rich water without stressing fish. Whether you keep shrimp, guppies, bettas, fry, small community fish, or snails, the iWhale sponge filter supports crystal-clear water and stable biological balance in even the smallest environments.

Description – iWhale Mini Sponge Filter

The iWhale Mini Sponge Filter provides effective mechanical and biological filtration through its high-density sponge and built-in air stone. Designed for internal installation in tanks up to 18.93L, it works by drawing water through the foam sponge where debris is captured and beneficial bacteria thrive.

High-Density Foam Sponge

The premium foam material traps waste particles while offering optimal surface area for nitrifying bacteria. This natural biological filtration process helps break down ammonia and nitrites—two toxic compounds that stress or kill fish. With this sponge filter, your tank maintains stable, clean, and healthy water conditions.

Built-In Air Stone

The integrated air stone releases fine bubbles that increase oxygen levels and improve water circulation. As bubbles rise, they gently pull water through the sponge, creating a quiet, energy-efficient filtration system ideal for nano tanks and delicate species.

Gentle Flow for Sensitive Fish

The low-flow design makes it perfect for bettas, shrimp, fry, or slow-swimming species. There is no harsh suction, no strong currents, and no risk of small aquatic animals being harmed.

Secure Suction Cup Installation

A strong suction cup clip keeps the filter firmly attached to the tank wall. The filter remains stable even during heavy aeration or active fish movement, preventing floating or shifting.

Extra Replacement Sponge Included

Comes with a bonus cleaning sponge for easy maintenance and long-term use. Simply squeeze the sponge in old tank water during water changes to refresh it without killing beneficial bacteria.

Air Pump Required (Not Included)

The filter operates using any external air pump, making it an energy-efficient, safe, and long-lasting filtration option with no internal motor or electricity submerged in the tank.

With simple operation, low maintenance, and high effectiveness, the iWhale Mini Sponge Filter provides one of the best filtration solutions for small aquariums in NZ.

Key Points

High-Density Foam Sponge:
Captures debris while providing a large surface for beneficial bacteria to support stable biological filtration.

Integrated Air Stone:
Built-in air stone produces fine bubbles that increase oxygen levels and improve water movement throughout the tank.

Suitable for Tanks up to 18.93L:
Optimised for nano tanks, small desktops, shrimp bowls, betta aquariums, fry tanks, and compact fish habitats.

Secure Suction Cup Mount:
Comes with a strong suction cup clip to ensure the filter remains firmly attached inside the aquarium.

Includes Extra Sponge:
Includes a bonus cleaning sponge to extend the lifespan of the filter and simplify ongoing maintenance.

Safe, Low-Flow Filtration:
Prevents fry, shrimp, and tiny fish from being sucked into the filter—perfect for breeding and nursery tanks.

Benefits

Safe for Delicate Species:
Ideal for shrimp, fry, bettas, and small fish that cannot tolerate strong currents or suction from traditional filters.

Improves Water Clarity & Stability:
Enhances beneficial bacteria growth to naturally manage ammonia and nitrite levels for healthier tank conditions.

Quiet & Energy-Efficient:
Air-driven design ensures near-silent operation and uses minimal electricity from an external air pump.

Easy to Clean & Maintain:
Simple sponge rinse keeps filtration consistent, making it beginner-friendly and hassle-free.

Why Choose This iWhale Mini Sponge Filter?

The iWhale Mini Sponge Filter stands out for its superior biological filtration performance in small tanks. Unlike power filters or box filters that create strong currents, this sponge filter offers gentle flow perfect for nano setups. It is safer for baby fish, shrimp, and stress-sensitive species, making it an excellent choice for breeding tanks or peaceful aquascapes.

Its durable build, included accessories, and replaceable sponge ensure long-lasting use. New Zealand aquarists appreciate its simplicity, reliability, and quiet operation—qualities that make it ideal for homes, offices, and personal living spaces. It requires no internal electricity, reducing risks and maintenance concerns.

For anyone serious about maintaining stable, clear, and healthy water in small tanks, this iWhale filter provides effective performance with minimal effort.

Conclusion

The iWhale Mini Sponge Filter is a compact, efficient, and safe filtration system designed to support clean, stable water conditions in small aquariums. With its foam sponge, built-in air stone, suction cup mount, and gentle flow, it offers the perfect combination of biological filtration, aeration, and safety for nano fish, shrimp, and fry.

Whether you're setting up a new betta tank, maintaining a shrimp colony, or breeding small fish, this filter provides reliable, low-maintenance, and long-lasting performance. For NZ aquarium owners looking for a dependable nano filtration system, the iWhale Mini Sponge Filter is an excellent choice.