NICREW Slim Aquarium Filter, Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums, Adjustable Flow, 42 GPH, 3W

Price: $19.99 - $17.99
(as of Feb 23, 2026 21:30:25 UTC – Details)

Product Description

1 3-in-1 Filter Cartridge

2 Efficient Filtration

Unique Waterfall Design

Oxygenates water to promote healthier, more active fish while reducing splashing to make the return exceptionally quiet.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Unique waterfall design Merchant video

Adjustable Flow

Reduce flow for betta, shrimp, plant or other low-flow needs without compromising filtration efficiency.

How to tell if flow is too strong for fish?

Delicate fish (such as betta and goldfish) require a more gentle water flow, or they will show frank signs of stress. If the flow is too strong, fish will find it difficult to swim around and prefer to stay in one area or avoid a particular area.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Adjustable water flow Merchant video

No-Mess Filter Cartridge Changes

BIO, mechanical, and chemical filtration in 1, fully assembled and ready to use.Easily slide out for quick maintenance.Easy to customize for your own needs. (Recommended to reserve 20% space to avoid overflow.)

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. No-mess filter cartridge changes Merchant video

Pre-Filter Sponge

Prevents small fish, shrimp and debris from getting sucked up.Purifies the waste chemicals in the water and makes it safe for your fish to live in.Adds more mechanical filtration, thus keeping your filter media from getting dirty as quickly.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Pre-filter sponge design Merchant video

Leveling Knob

Used to lever the filter against the tank to make sure the water level in the filter is not at such an extreme angle as to cause spillage.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Leveling knob design Merchant video

Patent Pending Priming System

Auto restart if power is interrupted and restored.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Patent pending priming system Merchant video

What if my filter stops working? Check if the impeller is clogged.

1. Use tweezers to gently remove the impeller;

2. Rinse the impeller;

3. Clean the impeller chamber;

4. Gently put the impeller back into place. Then try gently rotating the impeller by hand to make sure the impeller is free to rotate and prime the filter.

How to fit on a framed fish tank?

Gently pull the intake tube to fit on the rim. Please note that it does not fit framed or frameless aquariums that are more than 0.55 inches thick.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. How to fit on a framed fish tank? Merchant video

Did You Know?

Fill filter with water before plugging in. (The pump must not run dry.)The minimum water level in the tank should be no more than 1 inch below the aquarium rim.

What should I do If the priming process doesn’t occur?

Verify that all parts are installed CORRECTLY and FIRMLY. Fill up the water in the filter case and fish tank as much as possible. Make sure the flow control valve is firmly installed and in the position of maximum flow.

Why is my filter so loud?

Leveling knob need to be adjusted to reduce vibration.Air does not evacuate from filter. Check the sealing of flow control valve.Aquarium water level is lower than normal level, which results in excessive splash. Fill up the water in the fish tank.Impeller is worn and needs to be replaced.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Why is my filter so loud? Merchant video

Slim Filter

External

Installation

–

42 GPH

Max Output

–

3W

Power

–

Up to 5 Gallon

Fits Aquariums

–

External

Installation

Internal

42 GPH

Max Output

40 GPH

3W

Power

3.5W

Up to 5 Gallon

Fits Aquariums

2 – 5 Gallon

External

Installation

Internal

42 GPH

Max Output

53 GPH

3W

Power

5W

Up to 5 Gallon

Fits Aquariums

5 – 10 Gallon

Slim Filter Cartridges

Magi mini

Magi 200

Does the filter tube extend? Does the water have to be filled to the top to use?

Yes, it includes the additional tube to extend. It will be better to fill filter case completely with water before it starts. Otherwise, it will take some time to pump water up. (Water must at least cover the motor.)

What if the motor doesn’t start or makes a mechanical noise?

Make sure the impeller is free to rotate.

After a powerout, will this filter restart on its own?

Yes, the motor will restart by itself once the power turns on.

Can I use this in a turtle tank?

It is not recommended for turtle tanks.

How often would I have to change the cartridge and intake sponge?

Regular cleaning of the filter and its parts every two weeks. Replace filter cartridge monthly and replace intake sponge every 2-3 months.

Product Dimensions ‏ : ‎ 8.89 x 7.37 x 18.54 cm; 320 g
Date First Available ‏ : ‎ Sept. 8 2023
Manufacturer ‏ : ‎ NICREW
Place of Business ‏ : ‎ NICREW
ASIN ‏ : ‎ B0CGN1TV1G
Item model number ‏ : ‎ N83251
Best Sellers Rank: #1,452 in Pet Supplies (See Top 100 in Pet Supplies) #5 in Aquarium Filters
Customer Reviews: 4.0 4.0 out of 5 stars (2,233) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

Slim and compact design, hardly noticeable on the tank, great choice for nano and pico tanks up to 5 gallons.
Quiet operation with adjustable flow, doesn’t overly disturb the fauna, perfect for shrimp or betta.
Patent pending self-priming system, auto restart if power is interrupted and restored.
Comes with everything you need right out of the box for easy setup and use.
What’s included: Filter body, intake tube, extension tube, intake sponge, and filter cartridge.