6 Best Protein Skimmer For 300 Gallon Tank (Reviewed and Rated in 2021)

Maintaining proper hygiene for a 300 gallon aquarium can be very challenging especially when it comes to removing fish excretory and food waste. To solve such problems, you will need to invest in the best protein skimmer for 300 gallon tank. A protein skimmer is very essential when it comes to maintaining fish tanks especially large ones. It will generally improve the quality of water in your tank by eliminating organic wastes through air bubbles.

The market is flooded with plenty of protein skimmers and I know how hard it can be to make a decision on just one. You will want to select the best for your tank and since it’s a large tank you wouldn’t want to take any chances. Luckily, I will review 6 of the best you will find on the market and I will also guide you on how you can end up with the right one.

Best Protein Skimmer for 300 Gallon Tank Comparison Chart

Coralife Cone Protein Skimmer for Saltwater AquariumsCoralife11.6 pounds300 gallons
Coral Vue Technology ACV20110 Super Reef Sump SkimmerCoral Vue Technology22.3 pounds300-400 gallons
Bubble Magus G9 Protein SkimmerBubble Magus40 pounds230-400 gallons
ASM G-4 Protein SkimmerAll Seas Marine14 pounds300-350 gallons
MRC MR-2R Protein SkimmerMRC50 pounds300-450 gallons
Reef Octopus Regal Internal Protein SkimmerReef Octopus18.1 pounds200-400 gallons depending on filtration demand

This protein skimmer comes with a cone design and it is rated for 300 gallon tanks of saltwater. It only weighs 11.6 pounds and you can get it in other two sizes in case you have some other smaller tanks. It features a large neck which is designed to offer you enough foam production as well as total control.

What I like

I like the cone design that will allow unrestricted foam flow to the collection cup. This unit is performing and it will ensure that organic compounds are dissolved in your tank. You will not find this unit irritating during operations thanks to the quiet internal pump that will also reduce on the footprint.

What I don’t like

This unit received a number of quality issue complaints as some users claimed that they could not return it for replacement. Some say it is hard to find the replacements parts of this unit.

  • Ideal for reef and saltwater tanks of 300 gallons
  • Equipped with a large neck for efficient foam production
  • Advanced cone design for more foam flow
  • Quiet operations
  • Internal pump reduces footprint
  • Hard to get replacement parts

If you are looking for a reef sump skimmer for a 300 gallon tank that comes at a reasonable price, then the Coral vue technology ACV20110 skimmer might be what you need. This protein skimmer is rated for 300 to 400 gallon reef tanks. The unit is easy to install and you will get the best clarity and quality of water in your sump tank. It is only 10 inches meaning you can get to install it away from plain view.

What I like

It will serve you for longer thanks to the durable plastic construction. I also like the detachable cone neck which will allow efficient foam flow while boosting easy cleaning and maintenance. On top of that, I like that it is performing and of good quality while it comes at an affordable price. If you are new to protein skimmers, you will like how easy it is to install and use this unit.

What I don’t like

This unit is bulky and this may become an issue when it comes to fitting it in some sumps. Also, it doesn’t feature adjustable speeds meaning you will have to work with the fixed speed.

  • Equipped with a detachable cone neck
  • It is easy to install
  • It comes at an affordable price
  • Ensures high production of foam
  • Easy to clean and maintain
  • Speed is not adjustable
  • Heavy to fit in some sumps

This model is the latest from the bubble magus series of skimmers. It comes with dimensions of 11.02x 8.46x 24.21 inches and it weighs up to 40 pounds. It is made from cell cast acrylic material which is known for its durability meaning you will get a longer serving skimmer. It is rated for 230 to 400 gallon tanks and it boosts easy and quick maintenance.

What I like

Its construction guarantees a longer serving protein skimmer. It is fast and efficient to offer you quick removal of organic compounds in your tank. It is also, heavier than some models meaning it will sit well and it won’t make any noises during operations. The pump on this unit is powerful and efficient. You will also have better control on the water level when using this skimmer.

What I don’t like

This skimmer is very heavy as it comes weighing up to 40 pounds. This will make installations hard it may not fit in some weak tanks.

  • It has a powerful SP400 pump
  • It is easy to maintain
  • Can withstand turbulence
  • It is quick and efficient in performance
  • Comes with a durable construction
  • It is very heavy for a skimmer

This protein skimmer is effective and will deliver when other protein skimmers fail. It comes weighing only 14 ponds and it is rated for 300 to 350 gallon tanks. This skimmer is easy to install as you will only have to place it in your sump tank, have it plugged in and then adjust the flow rate of the out pipe. Once you are done you are good to go. Its design is simple meaning you will not find a hard time using this skimmer.

What I like

This skimmer features a simple design that is made from durable PVC tubing which makes it wear and tear resistant. Aside from that, it is very easy to install this is due to the simple design. You can get to control the outflow of this skimmer thanks to the adjustable outlet pipe. It has a powerful pump that is efficient in its operations. You will also get this skimmer at a reasonable price without compromising on the quality.

What I don’t like

This skimmer is built from cheap plastic which may seem durable but when dropped especially the cup, it will easily crack. You will have to be very careful when cleaning it.

  • It comes with a simple durable design
  • It is easy to install and maintain
  • Comes at a reasonable price
  • Equipped with a powerful pump
  • Comes with an adjustable outlet pipe
  • It can crack easily when dropped

This skimmer is created by my reef creations also known as MRC which makes some of the best protein skimmers for different tank sizes. The MRC MR-2R protein skimmer is on the heavy side as it weighs up to 50 pounds. It is rated for gallon tanks of 300 to 450 gallons. This skimmer may seem complicated at first glance because of its unique advanced design but it is quick to install and to maintain.

What I like

This skimmer is ideal for tanks from 300 to 450 gallons. It is equipped with two injectors which offer you total control of water flow in the skimmer without reducing or stopping the production of the bubbles. I also like that it is made from acrylic material which is more durable than PVC tubing. It is very quick when it comes to improving the water quality in your tank. I also like that despite its design, this unit is easy to clean.

What I don’t like

This skimmer tends to get dirty very quickly. This means that it will require you to do regular maintenance.

  • It is easy to clean
  • It can enhance the water quality very quickly
  • You won’t interrupt the bubble production as you change the water flow
  • It comes with a powerful pump
  • It is ideal for 300 to 450 gallon tanks
  • Tends to get dirty quickly

The reef octopus regal internal protein skimmer is what you need if you are looking for convenience topped with performance. This model is designed using cast acrylic as well as PVC material which will offer you a durable longer serving skimmer. It is ideal for 200 gallon tanks which need high filtration, 300 gallon tanks which need medium filtration and 400 gallon tanks which have got a light filtration demand.

What I like

It is made from durable acrylic and PVC material for a longer lifetime. It comes with 5 speed settings which are adjustable to offer you control on bubble production according to your tank’s demands. It can easily be disassembled when you want to clean it and carry out maintenance. The pump is energy efficient but powerful and it will offer you increased bubble production. You will not get any irritating noises from this skimmer during operations.

What I don’t like

It comes with a recommended water level depth of 7 inches. It can become sensitive in case you change from the recommended water level depth.

  • It has an energy efficient pump
  • Adjustable speed settings
  • You can get to fully control this protein skimmer
  • Made from durable materials
  • It performs quietly
  • It becomes sensitive to water level depth changes

Buying Guide

When buying a protein skimmer, there are a few things you will have to put into consideration. These will enable you to weigh your options better and end up with the right protein skimmer for your tank. Below is my buying guide with what you must consider buying you purchase a skimmer for your 300 gallon tank.


When buying a protein skimmer, you need to understand that not all of them perform the same and they are made for different tank sizes. Since we are looking at 300 gallon tanks, you need to find a skimmer that is rated for 300 gallon tanks. Failure to do so, you will end up wasting money and getting something that will not deliver as per your tank’s requirements.


The pump of any protein skimmer determines whether it is capable of producing the amount of bubbles need to improve water quality in your tank or not. Look for a skimmer rated for your tank but it should also have an energy efficient pump that will not consume too much power adding to your expenses.  The pump must also be capable of producing high amounts of bubbles for your cleaning your tank quickly.

Ease of installation

Before we get to that, you must know that there are different types of protein skimmers. While this gives you an option to choose from the many, you must know that installations are different on each type. Some are easy to install while others will need you to have some knowledge to do so. I recommend a protein skimmer that is easy to install and one that comes with a manual with detailed instructions.


When you want to buy a protein skimmer, you need to consider setting your budget first. You need to know how much you are willing to spend on a unit that is right for your tank size. You will find that protein skimmers for 300 gallon tanks come at a higher price than those for smaller tanks. Look for a quality skimmer that has all the features necessary to improve the water quality of your tank. It should also come at a reasonable price.


I suggest you select a protein skimmer that is made from durable materials. The most common materials used are cell cast acrylic plastic as well as PVC tubing. Acrylic material is known to be more durable and as it can withstand wear and tear as well as some drops.

Frequently Asked Questions

Q: Can I use a protein skimmer in a freshwater tank?

A: It is only advisable to use a protein skimmer in a freshwater tank in case it has high levels of dissolved organics in the water. Otherwise, protein skimmers work best in saltwater tanks because saltwater has the right tension of sea water which makes foam formation and skimming easy compared to freshwater.

Q: Will a protein skimmer remove ammonia?

A: No, it will not. Ammonia cannot be removed by a protein skimmer since it only removes organic substances. Ammonia is inorganic and it doesn’t foam that is why it can’t be removed by a protein skimmer.


I have come to the end of this review and am sure by now you know which protein skimmer to go for. My top 6 protein skimmers are all performing and they all come with an energy efficient pump. These skimmers are ideal for all 300 gallon tanks and you will be amazed at how easy it is to have them installed and maintenance is also quick and painless.

I understand how stressing it is to select a quality and performing protein skimmer that is why with my buying guide together with the reviews, you now can do so easily. I hope this guide and reviews had the right information and you can now select the best protein skimmer for 300 gallon tank.

Leave a Comment