The Best Aquarium Bacteria Starter for 2021


What is the best aquarium bacteria starter? This product is in demand for its numerous benefits including offering a natural biofilter, which is an essential in providing your pet fish with a healthy environment. Such can help in keeping them happy and healthy while also making your tank water clean and clear. It can work in eliminating harmful bacteria that would otherwise cause stress and sickness to your tank friends.

However, there are many types and features of a bacteria starter that you need to know in order to make the right choice. You can compare your options with solid information on what to look for from these products. That is why it pays off that you look into the features that make these products special. In the following, let us take a look at some of your choices for an aquarium bacteria starter.

What is the Best Aquarium Bacteria Starter for 2021

See also:

Top 6 Best Aquarium Bacteria Starters Reviews

1. API Stress Coat Water Conditioner


The API stress coat conditioner is known for its efficacy and thus, is generally preferred by many users. For one, the API stress coat conditioner is capable of removing and eliminating harmful chemicals in your tap water like ammonia, chlorine, chloramine, etc. As such, your fish will be able to live in a safer environment.

Aside from that, this conditioner is also useful to use whenever your fishes are sick or injured. The API conditioner contains Aloe Vera that is known to reduce stress and heal wounds as well as damaged fish tissue.

You can achieve these results by adding 5 ml of the product per 10 gallons of water. Make sure to use the cap that comes with the bottle and read the instructions. You can double this dose whenever your fishes have wounds or slimy coats.


  • Effective
  • Safe
  • Easy to use
  • Heals damaged fish tissue
  • Reduces stress


  • Quality control issues

2. Seachem Stability Fish Tank Stabilizer


The Seachem stabilizer is another effective product when it comes to cleaning fish tanks and removing harmful bacteria.

Unlike other products, the Seachem stabilizer utilizes aerobic, anaerobic and facultative bacteria to stimulate a natural biofilter. With this, these bacteria will remove and eliminate the harmful chemicals in your tap water.

These bacteria are completely safe. It won’t harm your fish and other tank inhabitants. They are non-sulfur fixing and don’t produce hydrogen sulfide.

When using, make sure to shake the bottle well and deactivate your ozone/UV filter. Pour 5 ml of the product per 40 liters of aquarium water on the 1st day. Use 5 ml per 80 liters for the next 7 days. You can add new fishes or plants into your tank as long as you maintain the dosage.

Keep in mind that this product has a shelf life of 4 years. Hence, it’s best to use it before that.


  • Safe
  • Natural biofilter
  • Effective
  • Easy to use
  • Eliminates harmful chemicals


  • Air exposure affects the bacteria

3. API Quick Start Nitrifying Bacteria for Freshwater Aquarium


The API Quick Start formula is another effective and reputable product that is safe to use in both freshwater and saltwater tanks.

This formula utilizes different bacteria that will be used to create an active and organic biofilter. As such, these bacteria will remove and eliminate the harmful chemicals and substances in your aquarium water.

You don’t need to worry. These bacteria are completely safe to your fishes and other tank inhabitants. In fact, you can even put in your fishes in the tank on the 1st day of treatment.

Make sure to shake the product well before using. Add 10 ml of the product per 10 gallons of aquarium water. For saltwater aquariums, you can double the dosage. Make sure you store the product in a cool, dry place to prevent affecting its quality.


  • Safe for tanks
  • Easy to use
  • Effective
  • Eliminates harmful chemicals
  • Creates a natural biofilter


  • Might take time to take effect

4. Fluval Hagen Fluval Biological Enhancer/Booster for Aquarium


The Fluval Hagen formula is also effective in purifying the water in your aquarium. In fact, it can be used in both freshwater and saltwater aquariums.

The Fluval Hagen formula provides a powerful team of helpful bacteria in order to create an organic and natural biofilter. With this, your aquarium will be purified from harmful bacteria and substances and thus, create a safe environment for your tank inhabitants.

The Fluval Hagen formula is extremely beneficial to use when setting up a new tank or introducing new fish species in your aquarium.

This formula is also completely safe to use. Remember to shake the bottle well before using. Add 10 ml of the formula per gallon of aquarium water. Many users recommend doubling this dose on the first day of using.


  • Effective
  • Creates a strong biofilter
  • Easy to use
  • Safe
  • For saltwater and freshwater tanks


  • Might need some time before taking effect

5. Tetra SafeStart Plus To Cycle New Aquariums


The Tetra SafeStart Plus formula is an effective concoction of helpful bacteria in order to create a natural and powerful biofilter.

To ensure that your tank inhabitants will thrive, you need to create a healthy and safe environment first. The filters in new aquariums are sterile and usually take up to 40 days for bacteria to thrive.

However, the Tetra SafeStart formula aids you in your aquarium set-up as it introduces helpful bacteria in your set-up. The bacteria can also help in purifying your tank water as it eliminates harmful bacteria like ammonia, chlorine, and nitrate. Aside from that, the bacteria are also safe to use among fishes.

Make sure to shake the bottle well before you use it. As for its dosage, just add 10 ml of the formula per gallon of aquarium water.


  • Creates a natural biofilter
  • Effective
  • Takes effect immediately
  • Safe
  • Easy to use


  • Short shelf life

6. Instant Ocean BIO-Spira Water Treatment for Aquarium Starter


The Instant Ocean BIO-Spira water treatment formula is also known for its efficacy when it comes to creating a natural biofilter.

This formula contains a mixture of nitrosomonas, nitrosospita, nitrococcus, and nitrospira that is both effective and safe. Once you place these nitrifying bacteria in the tank, they immediately take effect and start purifying your aquarium water. As such, you will notice a drop in ammonia, chlorine, and nitrate levels.

Aside from its efficacy, these bacteria are also safe to use among your tank inhabitants. The Instant Ocean water treatment also has no shelf life and doesn’t require any refrigeration.

Because of this, this water treatment is recommended when setting up a new tank, adding new species and the like.

Just make sure that you shake the bottle well before using. Remember that 5 ml of the formula can treat 10 gallons of aquarium water.


  • Takes effect immediately
  • Doesn’t cloud the tank
  • Effective
  • Safe
  • Fast water cycling process


  • Bit expensive

Aquarium Bacteria Starter Buying Guide

You know that it’s important to provide a tank with the best habitat and conditions for your fish and plant inhabitants. One of the ways to do this is to create a natural biofilter in order to eliminate harmful bacteria and purify your aquarium water.

Because of its benefits, aquarium bacteria starters are popular in the fish tank community. As such, there are numerous kinds available that might make choosing one difficult and overwhelming especially when you’re a beginner.

To help you out, here are some factors that you need to consider when in the market.

Tank Size

Aquarium bacteria starters are in different sizes and packaging. Typically, these factors depend on the size of your tank. The bigger your tank is, the higher dosage it will require and vice versa.

Make sure you purchase the appropriate amount of formula for it to be effective. Moreover, ensure that you read the instructions before adding it into your aquarium water.

Type of Bacteria Starter

Aquarium bacteria starters come in 3 different types that are the following: 1) bacteria in a bottle; 2) dry format bacteria; and 3) bacteria supplement.

These types provide different benefits to your tank. What you’ll choose depends on your personal preference.

However, before you purchase one, make sure that the bacteria are real and genuine nitrifying bacteria. Ensure that it also contains non-toxic components and that it’s safe to use in your tank.

Shelf Life

There are some types of aquarium bacteria starters that have short shelf lives and require refrigeration. On the other hand, there are also others that do not. What you will choose depends on your preference.


Lastly, you also need to consider the price for your product. Since there are numerous products in the market, it’s best to set up a price range to narrow down your choices.

What is an Aquarium Bacteria Starter?


Aquarium bacteria starters are known for their effect in purifying and eliminating your aquarium water with harmful chemicals like ammonia, chlorine, nitrate and the like.

Also known as bacteria boosters, they utilize colonies of bacteria to create a natural and organic biofilter. It’s important to store these formulas properly and to provide the bacteria enough food supply.

Types of Aquarium Bacteria Starters

There are three types of aquarium bacteria starters in the market.

The first type is the aquarium bacteria contained in a bottle. They contain live nitrifying bacteria such as Nitrosomonas, Nitrosopita, Nitrococcus, and Nitrospira.

Because of this, they are considered to be the most effective out of all the types. They are also containing non-toxic substances that you can even add in your fish and other tank inhabitants after dropping the product in.

However, since they are only kept in a bottle, aquarium bacteria in a bottle generally have a short shelf life. Some of these starters also require to be refrigerated in order to protect the bacteria.

The second type is the dry format bacteria. Generally, they are the dry version of the nitrifying bacteria found in the bottles.

These types contain both Nitrobacter and Nitrosomonas that will aid in the purifying process. Simply put, these types work together to transform ammonia to nitrite and nitrite to nitrate.

Since these come in a powder form, they last longer compared the other types. They come with scoops to help in measuring the amount of powder.

The last type is the aquarium bacteria supplement. These types generally come in tablet form or stored in bottles.

Out of all the types, these supplements are the most versatile since they aid in purifying the tank water and also act as health boosters for your tank. As such, they contain a mixture of nitrifying bacteria, enzymes and other substances that will greatly benefit your fish and tank inhabitants.

Some versions of these types can be used on sick fishes and heal damaged tissues.

Why Do You Need Aquarium Bacteria Starter?

One of the responsibilities of a fish tank owner is to provide a safe and healthy environment for their fish and aquatic plants. One of the ways to do this is by using aquarium bacteria starters.

Also known as bacteria boosters, these are generally helpful when it comes to new tank set-ups. Since they’re new, the filter is still sterile. As such, it is common for ammonia and nitrite levels often spike up.

Aquarium bacteria starters contain a mixture of nitrifying bacteria that will aid in the creation of a natural biofilter. Using these will introduce good nitrifying bacteria in your tank that will detoxify and purify your water for you. As such, you will notice a drop of ammonia and nitrite levels. With this, you will have high-quality water at all times.

Aquarium bacteria starters are also useful in terms of care and maintenance. Overtime, tanks generally rack up much wastes coming from food, wastes and the like. As these wastes pile up, the toxicity of your tank rises. Moreover, you will experience a drop in the water’s quality and pH level.

Aquarium bacteria starters prevent that from happening by disintegrating these organic wastes. Aside from detoxifying the water, you also obtain a cleaner tank in general.

Frequently Asked Questions

How to change aquarium filter without losing bacteria?

There are three ways to change your aquarium filter without necessarily losing all the bacteria.

The first option is to leave your old filter in the tank while installing a new one. This is the easiest option out of all the three. However, you need to be mindful of the flow rates, especially when you have young, small or betta fish or when you have live plants.

Strong flow rates might stress out your fishes while it may also mess up the carbon dioxide levels for your plants.

The second way is to re-use the media of your old filter. That way, you wouldn’t have any problem. However, before you do this, make sure your both your old and new filters have the same size and shape and use the same media.

Of course, you also have to ensure that your old filter media is still in good condition.

The last option is to colonize the new filter. You can do this by simply leaving the old filter’s media next to the new filter. Overtime, the bacteria from the old filter’s media will colonize the new one.

How often to use bacteria supplement in aquarium?

Before you start, make sure you read the instructions first.

Setting up a new tank would require adding the bacteria supplement for at least once a week. This allows the bacteria to grow and colonize your filter’s media.

For maintenance purposes, it’s best to add these bacteria supplements once a month or once every 2 months.

Where to buy Aquarium Bacteria Starter?

Aquarium bacteria starters can be purchased in your local fish stores and/or other specialty shops. They can also be found in online shopping sites like eBay, Amazon, and the like.

Regardless of where you buy them, ensure that the product contains genuine bacteria and contain non-toxic substances.


It is essential that you keep your tank’s environment clean. Aside from regular tank maintenance, you need the best aquarium bacteria starter to help prevent bad bacteria growth and colonization. It is an easy to use product that you can use to make sure that it can work as an effective biofilter immediately.

To ensure that you’re picking the right one, you need to compare your choices. For help, you can refer to the above buying guide that outlines excellent products in the category along with the things you need to check when considering what to buy. Buy the right bacteria starter for aquarium today!

1 thought on “The Best Aquarium Bacteria Starter for 2021”

  1. wow,this is what i was looking for,let me sign up using the links you provided to buy the best bacteria starter you have reviewed.


Leave a Comment