The Best Protein Skimmers (Review) in 2021

Last Updated June 2, 2021

Saltwater aquariums are fantastic, providing the opportunity to have a range of aquatic live in your home that just isn’t possible with a fresh water aquarium. However, such habitats require specific conditions, knowledge, and a certain amount of upkeep and maintenance. One of the main concerns with saltwater tanks is the build-up of organics waste, which can be detrimental to the fish and other life that is within the aquarium. One of the best ways to deal with such waste is with a protein skimmer. But, with so many different types and sizes to choose from, knowing which is the right one for your aquarium can be difficult. Our panel of aquatic experts have created a list of the best protein skimmers to help you make the right decision.

Related Post: Best Aquarium

The Best Protein Skimmer


The Bubble Magus BM-Curve 5 Protein Skimmer is designed for use in salt water aquariums up to 140 gallons. It is extremely efficient and works with a Needle-Wheel pump system. The skimmer is very quiet, creating next to no noise when working. It is also easy to set up, adjust, and clean with its quick-release collection cup; the skimmer also has a small footprint, particularly in relation to its power.

Works with tanks up to 140 gallons

Skimmer fits most sumps easily

Skimmer measures 7.28” x 7.08” x 18.5”

Uses a Needle-Wheel pump system

Extremely quiet operation

  • Brand: Bubble Magus
  • Model: BM-Curve 5
  • Weight: 6.9 pounds


The Classic 11-INT Needle Wheel Protein Skimmer from Reef Octopus is perfect for use in small aquariums that have limited sump space. The ultra-compact design has a cast acrylic body construction and runs through its own ‘air shredding’ Aquatrance pump. The pump produces the perfect mix of air and water for optimal waste removal, while a vented wedge offers precision control. Cleaned water exits below the water level, meaning the whole operation is much quieted than it is with some protein skimmers. Additionally, water is drawn directly from the sump, meaning that a feed pump is not required. It is also easy to disassembly for maintenance.

Ultra-compact design

18-watt pump power

Easy maintenance

Aquatrance Needle / Pin wheel pump

Maximum flow rate 750L/PH

Output size 40mm

  • Brand: Reef Octopus
  • Model: AC20284
  • Weight: 0.32 ounces


AquaMaxx Hang-On-Back Protein Skimmer
AquaMaxx Hang-On-Back Protein Skimmer

If you are looking for a protein skimmer that is simple to set up and operate, then the AquaMaxx HOB-1.5 Hang-On-Back Protein Skimmer might be just want you are looking for. The skimmer is made of a cell-cast acrylic construction that improves its reliability, efficiency, and durability. It includes a movable collection cup that can be moved up or down, allowing the foam level to be adjusted from wet to dry. The skimmer is suitable for aquarium rims up to ¾ inch thickness and has a filtration rating of up to 90 gallons.

Dimensions length 7.5”, Width 3.5”, Height 17”

Fits aquarium rims up to 3/4”

Filtration rating: up to 90 gallons

AquaMaxx SHARK 1.0 pump with 11-watt power consumption

Cell-cast acrylic construction

  • Brand: AquaMaxx
  • Weight: 7.8 pounds


Coralife Super Skimmer with Pump
Coralife Super Skimmer with Pump

The Super Skimmer with Pump from Coralife is suitable for use in aquariums from 65 gallons to 220 gallons. Its adaptable design means that it can be used either in-sump or on a mounting bracket on the side of the aquarium. The patented needle-wheel impeller and aspirating venturi create a high performing skimmer without excessive power demands. Fine proteins and organic compounds are attracted to micro bubbles within the reaction chamber and are deposited in the collection cup for easy removal.

Effective for aquariums from 65 gallons to 220 gallons

Works on a patented needle wheel aspiration system

Dual injection inlets to increase water / bubble contact time

Diffuser prevents micro-bubbles from flowing into the main aquarium

Adaptable for use in sump or on a mounting bracket

Effortless cleaning with wide neck collection cup tat includes an easy twist feature

  • Brand: Coralife
  • Model: 100105272
  • Weight: 6 pounds


A low profile, compact protein skimmer, the 115 Mini from Aquatic Life is ideal for nano-tanks up to 30 gallons. It can be mounted on the inside of the tank with mounting bracket and suction cups. However, it is also the right fit for most rear overflow or filtration compartments. The 8-watt needle-wheel impeller pump maximizes contact between air and water and offers effective and efficient organic waste removal. The skimmer is easy to clean, and a built-in channel hides the grounded power cord for safety.

Measures 3” x 3-1/4” x 10-5/8”

Suitable for aquariums up to 30 gallons

Quick-lock design for easy opening for cleaning

Fits most rear overflow or filtration compartments

Can be mounted on the inside of the aquarium

Uses 8-watt needle-wheel impeller pump

  • Brand: Aquatic Life
  • Model: 510114
  • Weight: 1.55 pounds


Designed to work with tanks up to 65 gallons, the SCA-301 Protein Skimmer from SC Aquariums includes 28-watt pump and air silencer. This makes the skimmer one of the quietest available. The easy assembly pump can be secured to the base of the aquarium using suction cups, which are included. It then sits under the body of the skimmer, allowing the output to jet upwards into the chamber to create the necessary micro-bubbles. The collection cup is removable for easy cleaning and maintenance and includes a drain tube. The tube funnels away excess moisture and skimmate if weekly cleaning is missed for any reason.

Easy to assembly, clean, and maintain

Drain tube prevents overflow

Suitable for use with tanks up to 65 gallons

Skimmer measures 4.25” x 7” x 17”

Includes air silencer

  • Brand: SC Aquariums
  • Model: SCA-301
  • Weight: 3.25 pounds


Instant Ocean SeaClone Protein Skimmer

A great choice for larger tanks, this protein skimmer for aquariums is suitable for tanks up to 100 gallons in capacity. The high capacity collection chamber makes short work of keeping those extra bits and pieces captured and collected, without disturbing your fish.

While this in-sump or hang-on installation is super easy to set up, detach and reattach when required, some customers have noticed that this option can be a little loud. As such, it may not be suitable for those with sensitive hearing – fish, human or otherwise.

Works with up to 100 gallon aquariums

Hang-on or in-sump installation

High capacity collection chamber

Easy installation

  • Brand: Instant Ocean
  • Model: SCPS-100
  • Weight: 3.12 pounds


Marine Color Sunsun Aquarium Surface Protein Skimmer

A great choice in protein skimmer for smaller tanks, this small but mighty option is powerful enough to keep on top of cleans, while remaining compact enough to stay out of the way of your fish. It’s easy to attach using the suction cups, but can take a little bit of time to get the fiddly task of attaching this piece, just right.

The 1.4m power cord provides plenty of room for smaller tanks, so you can have a little more freedom in placing your protein skimmer. Once it’s set up, customers have been delighted with the results and found this item quiet, easy to use and very effective in doing its job.

1.4m power cord

Adjustable flow rate

Compact and ideal for smaller tanks

Works brilliantly to remove biofilm

Suction cups attach to sides

  • Brand: Sunsun
  • Model: 5W JY03
  • Weight: 11.22 Ounces


The AC20287 Octopus Needle Wheel Skimmer by Coral Vue Technology is an easy to use in-sump skimmer designed for use in tanks up to 210 gallons, it uses an efficient 6-inch needle wheel skimmer for top-quality performance. The gate valve offers easy water level adjustments, while the 4-inch cone neck provides easy transition of proteins from the bubbles into the collection cup. The cup itself is easy clean with a quick-release neck.

Suitable for tanks up to 210 gallons

6-inch needle wheel / pinwheel skimmer

Easy water level adjustment with gate valve

In-sump only skimmer

  • Brand: Coral Vue Technology
  • Model: AC20287
  • Weight: 0.32 ounces


The SCA-302 180 Gallon Protein Skimmer is designed to work with heavy load 180-gallon saltwater aquariums. It features an Atman 2000 pump needle impeller and its compact size means that it fits most sumps. The latest version of this skimmer features a larger collection cup as standard and is laser cut to allow for seamless assembly.

Dimensions 9” x 18” x 9.5”

Includes Atman 2000 pump needle impeller

Compact size

Designed to work with heavy load 180-gallon aquariums

Large collection cup

  • Brand: SC Aquariums
  • Model: SCA-302
  • Weight: 9 pounds

Best Protein Skimmer Buying Guide & FAQ

Choosing the right protein skimmer for your saltwater aquarium is not just about knowing which the best products are, it is also about knowing why they are the best. In this part of the buying guide we explore protein skimmers in more detail; looking at what you need to consider when buying a skimmer for your aquarium, what the benefits are of a skimmer, and the different types that are available. Additionally, we answer some of the most frequently asked questions about these important aquarium devices.

Things to Consider When Buying Protein Skimmers

The right protein skimmer for your aquarium depends on a wide range of variables, from the size of your tank to how often you want to be cleaning the collection cup. However, there are some considerations that are universal. These include:

  • Cost

When considering the cost of a protein skimmer, it is not just the initial outlay that is important. There are also the ongoing costs to budget for. Skimmers use pumps, which in turn require electricity. The amount of electricity, and therefore the level of cost, depends on energy requirements of the pump. The more energy it requires, the more electricity it will use. Check the wattage and efficiency of any pump you are considering.

  • Size

The size of the skimmer you require is dependent firstly on the size of the aquarium tank that you have. Water level is also a consideration as is the type of skimmer that you are considering. You need to consider a range of questions before you settle on the right size.

These include:

  1. Will your skimmer hang off the back of your tank or sit in a sump?
  2. If your skimmer is to work with a sump, what size footprint will it accommodate?
  3. How much head room (space above the tank) do you have to accommodate a skimmer?
  4. If the skimmer is outside of the sump, does it require any additional or special plumbing?
  • Pump working capability

To work the skimmer needs to be supplied with air and water, this is the job of the pump. If the pump is not strong enough for the task at hand, then the skimmer will work slowly and ineffectively. The strength of the skimmer is directly related to the water flow that is delivered to it in relation to the volume of the aquarium. The amount of air that is pump through is important for the formation of the bubbles. If the pump is pumping too much water in relation to air, the air bubbles do not have enough time to remove the proteins and other organic waste matter for the water. The result of this is organic waste returning to the aquarium, rather than being collected for removal.

  • Bubble size and quantity

The size of the bubbles produced by the skimmer affect the efficiency of the unit. Smaller bubbles are more efficient, the more efficiently it works. Similarly, you want to produce as many bubbles as possible as this increases the surface area for the proteins to attach to.

Decorative aquarium

Benefits of Protein Skimming

The main benefit of protein skimming is that it removes small particles of organic waste, such as food waste and other proteins from the aquarium habitat. This results in an oxygen rich environment and improves the health and survival rate of the fish in the aquarium.

Using a skimmer also helps to remove nitrates and other materials that can easily result in further breakdown and lead to the appearance algae or encourage it to spread. If not dealt with early, algae can be extremely difficult to control in saltwater aquariums, so using a skimmer to help prevent it appearing in the first place is always the best course of action.

Dirt build-up in an aquarium environment can also lead to issues and affect the health of aquatic life. Dirt can cause the water to become cloudy and result in not enough light penetrating the water. A skimmer helps clear cloudy water and restores it to the optimal condition for the marine life within the aquarium.

If organic waste compounds are left to dissolve within the tank they can create unstable pH levels. If they become unfavorable for the marine life within the tank, it can have a detrimental effect on the health of the fish and other animals. An effective protein skimmer helps to maintain stable pH levels and supports the health and wellbeing of the occupants of the aquarium.

Types of Protein Skimmers

There are several different types of protein skimmers for you to choose from. The type that is right for you depends on a number of factors including the size and type of aquatic set up you have or are considering. The most common types of skimmers are hang on skimmers, in-tank skimmers, in-sump skimmers, and external protein skimmers.

  • Hang on skimmers

This type of skimmer is designed to hang on the back of the aquarium. They are a good choice for aquariums that do not have a sump. They generally attach with suction cups and reduce the space required inside the tank.

  • In-tank skimmers

In tank skimmers are generally compact in size, so they can be placed in the tank without greatly reducing the space needed by the marine life. Where the right size in tank skimmer is chosen for the tank they can be an effective choice.

  • In-sump skimmers

If you have a sump in your tank, then this type of skimmer can be integrated into it. It is important to consider the footprint of the skimmer to ensure it fits the sump you have.

  • External skimmers

These are situated outside the aquarium and require additional plumbing. The water is fed into the skimmer, where it is cleaned and then returned to the aquarium.

As well as these four basic types, there are also different internal workings to consider. Generally, skimmers operate as either co-current flow or counter current flow.

  • Co-current flow

In a skimmer that works through co-current flow, air is introduced at the bottom of the chamber and comes into contact with the water as it rises towards the collection cup or chamber. Examples of co-current flow systems include:

  • Air stone

This is one of the oldest forms of skimming where pressurized air pushes through the diffuser to produce a great quantity of micro bubbles. While an effective and economical choice it is a higher maintenance system than other more modern approaches. The air stone is generally, an oblong block of wood that has been partially hollowed.

It is positioned at the base of a water column. Water is then pumped into the column and passes the rising bubbles to return to the tank. Such systems are not suitable for small home aquariums as to get the required contact time with the bubbles the units need to be several feet in height.

  • Venturi

A venturi pump is used to create bubbles in a water stream. Water from the aquarium is pushed through the venturi, where small bubbles are added, before it enters the body of the skimmer body. The compactness and efficiency of this method makes it popular with many aquarium owners. However, the venturi pump design is most often incorporated a more complex design, rather than being used as a stand-alone design.

  • Counter-current flow systems

These systems are more effective and efficient than co-current flow systems, which is why those on our best protein skimmer list use this approach. In counter-current systems, air is forced into the system under pressure and moves against the flow of the water for a while before it rises towards the collection cup. The effectiveness of this type of system comes from the longer period of contact between the bubbles and the water. Examples of counter-current systems include the aspirating skimmer.

Aspirating skimmers include those that use a pinwheel or needle wheel impeller. Pin wheel designs have impellers that consist of a disk with pins that are mounted at 90-dregrees to a disk and parallel to a rotor. A needle wheel impeller consists of a series of pins that project from a central axis perpendicularly to the rotor. In both cases the impeller shreds or chops the air, which is introduced by either an external pump or a venturi apparatus. This motion creates micro-bubbles. Such skimmers are very popular with owners of home aquariums and work well with small tanks as they are compact, quiet, and easy to set up. They have lower power requirements than other skimmer setups because the pump is pushing a mix of water and air.

Cute white small fish in the aquarium

Best Protein Skimmer FAQ:

Q: What is a protein skimmer?

A:  A protein skimmer is a device that is added to a saltwater aquarium to remove organic waste compounds, including food waste, from the water. In doing this it improves the quality of the water and creates the ideal environment for the marine life within the aquarium.

Q: How does a protein skimmer work?

A:  A protein skimmer works by creating micro bubbles that attract the dissolved protein particles. The resulting foam is pushed into a collection chamber or cup where it can be safely removed from the aquarium environment.

Q: Where should I place my protein skimmer?

A:  Your protein skimmer should be the first step in your filtration process. If you use an in-sump system, then its placement depends on where your sump is situated. A hang on system should be placed at the back of the aquarium at the correct water level for your specific system. You should always check the manufacturers guide for proper placement of your specific make and model.

Q:  How to adjust protein skimmer?

A:  Once you have the right skimmer for your aquarium set up, you need to determine the depth at which it should be placed. Use your manufacturers guide to achieve this as different skimmers have their own specific requirements. Next, allow the skimmer to fill with water and connect it to an electrical outlet. The best skimmers have an adjustable valve that allows you to vary the amount of air that enters the system. However, most experts recommend that you run the skimmer for a few days without adjusting the valve to let it settle in. After this time make small adjustments until foam is collecting in the collection chamber or cup. As the valve adjustments differ depending on the make and model, refer to your manufacturers guide for specific adjustments.

Q:  How to clean protein skimmer?

A:  Protein skimmers have a collection chamber or cup, where the protein and other waste particles are deposited in the form of foam. In most cases the cup or chamber is removable, so you can detach it from the system and empty the foam before reconnecting the cup. Generally, this needs to be done once or twice a week, however, it varies depending on the amount of skimmate and the general health of your aquarium. For more general cleaning and maintenance refer to your manufacturer’s guide so that you do not invalidate any warranty that comes with your skimmer.

By following the guidance here and choosing the right protein skimmer for your saltwater aquarium, you can improve the health and longevity of your aquarium animals and enjoy watching them for years to come.


  1. Adam Denish, DVM, Freshwater Versus Saltwater Aquariums: What You Need to Know, PetMD
Wendy Young
A freelance writer and word nerd, Wendy is a content writer with a knack for getting into the nitty-gritty of pet ownership. For the past three years, she’s been researching and writing a huge range of different topics – but always comes back to her beloved pet articles. Lover of all things four-legged and owner of Harley, Pepper and Rush, Wendy is currently completing her MNSW at Edge Hill University.
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