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10 Best Betta Water Conditioners in 2024 – Reviews & Top Picks

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By Lindsey Stanton

Betta fish in aquarium

Using a water conditioner is necessary to keeping your Betta fish healthy. Water conditioners function to remove chlorine and chloramines that are present in tap water, which can be dangerous for fish. Some water conditioners also work to improve the health of your Betta through scale support or detoxifying waste products like ammonia and nitrite.

There are tons of water conditioners on the market, though, which can make it difficult to choose without reviews. We’ve put together this list of the 10 best water conditioners for Bettas to help you choose the best product for your Betta’s home. This will also help you identify which products have bonus features to help maintain your Betta’s health or water quality.

A Quick Comparison of Our Favorites in 2024

Rating Image Product Details
Best Overall
Winner
API Stress Coat Aquarium Water Conditioner API Stress Coat Aquarium Water Conditioner
  • Available in eight sizes
  • Detoxifies heavy metals and ammonia
  • Can treat up to 37
  • 800 gallons of water
  • Best Value
    Second place
    Zoo Med Betta H2O Water Conditioner Zoo Med Betta H2O Water Conditioner
  • Three bottles to an order
  • Detoxifies heavy metals and nitrites
  • Each bottle treats up to 30 gallons of water
  • Premium Choice
    Third place
    Aquatic Experts TankFirst Complete Water Conditioner Aquatic Experts TankFirst Complete Water Conditioner
  • Can treat up to 10
  • 000 gallons of water
  • Detoxifies ammonia and nitrite
  • No unpleasant smell
  • Tetra Aquasafe for Bettas Aquarium Water Conditioner Tetra Aquasafe for Bettas Aquarium Water Conditioner
  • Supports slime coat
  • Reduces fish stress
  • Includes a measuring cap
  • Aqueon Betta Bowl Plus Water Conditioner Aqueon Betta Bowl Plus Water Conditioner
  • Detoxifies heavy metals
  • Cost effective
  • Includes trace elements for Betta health
  • The 10 Best Water Conditioners For Betta Fish

    1. API Stress Coat Aquarium Water Conditioner – Best Overall

    API Stress Coat Aquarium Water Conditioner

    Bottle sizes available: 1 oz, 4 oz, 8 oz, 16 oz, 32 oz, 64 oz, 1 gallon, 5 gallon
    Dosing: 5 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The best overall Betta water conditioner is the API Stress Coat Aquarium Water Conditioner. This product is available in eight bottle sizes from 1 ounce to 5 gallons, which treats 60-37,800 gallons of tank water. It removes chlorine and chloramine, and it also detoxifies heavy metals and ammonia within the tank. This water conditioner also contains aloe vera, which helps support scale and slime coat health. It can also reduce stress in your Betta fish, especially during times of high stress like just after bringing it home or a move. All but the 1 gallon and 5-gallon bottles include a measuring cap to make dosing easy and safe. The larger bottles come with a pump top.

    If this product is use incorrectly and label instructions are not followed, it is possible for it to make your fish ill. Make sure you follow all directions as written and measure your doses.

    Pros
    • Available in eight sizes
    • Can treat up to 37,800 gallons of water
    • Detoxifies heavy metals and ammonia
    • Contains aloe vera to support fish health
    • Reduces fish stress
    • Six bottle sizes include a measuring cap
    • Two sizes include a pump top

    Cons
    • Can make fish sick if label instructions are not followed 


    2. Zoo Med Betta H2O Water Conditioner – Best Value

    Zoo Med Betta H2o Water Conditioner

    Bottle sizes available: 5 oz (three bottles)
    Dosing: 5 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Zoo Med Betta H2O Water Conditioner is the best Betta water conditioner for the money. This product is available in 0.5-ounce bottles, but three bottles are included in the order. Each bottle can treat 30 gallons of tank water. This product removes chlorine and chloramine, and it works to detoxify nitrites and heavy metals. It helps reduce stress in your fish by improving the water quality and it works instantly. This water conditioner includes a Betta sticker in every package, which is a fun addition to each order.

    This product is only available in the 0.5-ounce bottle size, which may be inconvenient if you prefer to stock up on water treatment products.

    Pros
    • Three bottles to an order
    • Each bottle treats up to 30 gallons of water
    • Detoxifies heavy metals and nitrites
    • Reduces fish stress through improved water quality
    • Begins working instantly
    • Includes a sticker with every package

    Cons
    • Only available in one small bottle size


    3. Aquatic Experts TankFirst Complete Water Conditioner – Premium Choice

    TankFirst Complete Aquarium Water Conditioner

    Bottle sizes available: 9 oz (regular), 16.9 oz (concentrated), 33.8 oz (concentrated)
    Dosing: 5 ml product for 10 gallons of tank water (regular), 1 ml product for 10 gallons of tank water (concentrated)
    Detoxifies: Yes
    Supports scale health: No

    The premium choice for Betta water conditioner is theAquatic Experts TankFirst Complete Water Conditioner. This product is available in a concentrated version, which is available in 16.9 ounces, which treats up to 5000 gallons, and 33.8 ounces, which treats up to 10,000 gallons. The unconcentrated version is available in 16.9 ounces and can treat up to 1,000 gallons of tank water. This water conditioner does not have an unpleasant smell, which is common in water conditioners. It instantly works to detoxify ammonia and nitrites, and each bottle size includes a dosing cap.

    It’s necessary to follow the instructions on these products properly, especially the concentrated version. It is possible to overdose this water conditioner and doses greater than 3 times the recommended dose can be detrimental to your fish.

    Pros
    • Available in two sizes
    • Cost effective
    • Available in concentrated and unconcentrated versions
    • Can treat up to 10,000 gallons of water
    • Detoxifies ammonia and nitrite
    • No unpleasant smell
    • Begins working instantly
    • Includes a dosing cap

    Cons
    • Can make fish sick if label instructions are not followed
    • Premium price


    4. Tetra Aquasafe for Bettas Aquarium Water Conditioner

    Tetra AquaSafe Aquarium Water Conditioner

    Bottle sizes available: 69 oz
    Dosing: 10 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Tetra Aquasafe for Bettas Aquarium Water Conditioner is an inexpensive option for conditioning your Betta’s water. This product is available in a 1.69-ounce bottle and can treat 50 gallons per bottle. It detoxifies heavy metals and removes chlorine and chloramines. It begins working quickly and contains ingredients which help replenish slime coat on your fish to improve health and reduce stress. This bottle includes a measuring cap to help with dosing.

    This product is only available in one bottle size that treats up to 50 gallons of tank water, which may be inconvenient for caring for larger tanks or stocking up on products. This water conditioner does not detoxify ammonia or nitrites.

    Pros
    • Treats 50 gallons of tank water
    • Detoxifies heavy metals
    • Works quickly
    • Supports slime coat
    • Reduces fish stress
    • Includes a measuring cap

    Cons
    • Only available in one small bottle size
    • Does not detoxify ammonia or nitrites


    5. Aqueon Betta Bowl Plus Water Conditioner

    Aqueon Betta Bowl Plus Water Conditioner

    Bottle sizes available: 4 oz
    Dosing: 50 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Aqueon Betta Bowl Plus Water Conditioner is a good pick for small fishbowls and tanks. One bottle can treat approximately 25 gallons of tank water. It works to detoxify heavy metals and includes trace elements that Betta fish need to stay healthy. It helps reduce fish stress and support scale health. This water conditioner can also help support bright colors in your Betta fish. It includes a handy measuring cap with the bottle.

    This is only available in one bottle size and is intended for small bowls and tanks, so it takes a lot of product to treat larger tanks. This water conditioner does not detoxify ammonia or nitrites.

    Pros
    • Detoxifies heavy metals
    • Cost effective
    • Includes trace elements for Betta health
    • Reduces fish stress
    • Supports slime coat
    • Supports bright colors
    • Includes a measuring cap

    Cons
    • Only available in one bottle size
    • One bottle only treats around 25 gallons of tank water
    • Does not detoxify ammonia or nitrites


    6. Natural Rapport The Only All-in-1 Water Conditioner Fish Need

    Natural Rapport Aquarium Water Conditioner

    Bottle sizes available: 16 oz
    Dosing: 5 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Natural Rapport The Only All-in-1 Water Conditioner Fish Need is a good product from a small business that serves multiple functions in your tank. It’s available in a 16-ounce bottle, which treats approximately 950 gallons of tank water. This product detoxifies heavy metals, ammonia, and nitrites, balances pH, and supports scale health and slime coat production. It also adds necessary electrolytes to your Betta’s tank or bowl.  The manufacturer claims that this product cannot be overdosed, making it safe for your Betta fish as well.

    The cap on this bottle can be used for dosing, but it isn’t marked with specific measurements, which may make dosing for smaller tanks difficult. It’s only available in one bottle size, although this bottle should last a long time.

    Pros
    • Treats 960 gallons of tank water
    • Detoxifies heavy metals, nitrites, and ammonia
    • Balances pH and adds electrolytes to the water
    • Supports slime coat
    • Cannot be overdosed per manufacturer

    Cons
    • Cap is not marked with measurements
    • Only available in one bottle size


    7. API Betta Water Conditioner

    API BETTA WATER CONDITIONER Betta Fish Freshwater Aquarium Water Conditioner

    Bottle sizes available: 7 oz
    Dosing: 25 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The API Betta Water Conditioner is available in a 1.7-ounce bottle and is made for conditioning water for small tanks and bowls. It contains aloe vera and green tea extract to support slime coat and scale health and reduce fish stress. Green tea extract is an antioxidant and can help reduce inflammation and support healing after injury and illness. This water conditioner detoxifies ammonia and improves the water quality for your Betta.

    This is only available in one bottle size and is intended for water conditioning small spaces. You can only condition about 20 gallons of water with one bottle. It does not include a measuring cap. Since it is intended for small tanks, it is measured in drops, which can make dosing difficult.

    Pros
    • Formulated for small tanks/bowls
    • Reduces fish stress
    • Supports slime coat
    • Green tea extract reduces inflammation and improves healing
    • Detoxifies ammonia

    Cons
    • Only available in one bottle size
    • Only treats about 20 gallons of water per bottle
    • Does not include a measuring cap


    8. Wardley Fresh & Salt Water Aquarium Conditioner

    Wardley Fresh & Salt Water Aquarium Conditioner

    Bottle sizes available: 4 oz
    Dosing: 5-10 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Wardley Fresh & Salt Water Aquarium Conditioner is a very affordable option for water conditioning for your betta fish. It neutralizes heavy metals and supports scale and fin health. This product contains herbal extracts that help support scale and fin health, as well as reduce fish stress, especially after travel or moving to a new tank. It can be dosed at 5ml per 10 gallons to remove chlorine and 10ml per 10 gallons to remove chloramines or stimulate wound healing.

    This water conditioner is only available in one bottle size and does not detoxify ammonia or nitrites. It also helps regulate pH at 7.0, which can be beneficial, but it can also shock your fish if the pH of the environment isn’t at 7.0 and sudden changes in pH can be dangerous for fish. This bottle does not contain a measuring cap.

    Pros
    • Cost-effective
    • Detoxifies heavy metals
    • Reduces fish stress
    • Lower dose removes chlorine
    • Higher dose removes chloramine and supports healing

    Cons
    • Only one bottle size available
    • Does not detoxify ammonia or nitrites
    • May alter pH
    • Doesn’t include a measuring cap


    9. Splendid Betta Complete Water Conditioner

    SPLENDID BETTA COMPLETE WATER CONDITIONER Water Conditioner

    Bottle sizes available: 25 oz
    Dosing: 2 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Splendid Betta Complete Water Conditioner is intended for small tanks or bowls, and one bottle only treats 15 gallons of tank water. It detoxifies ammonia and heavy metals in the water and supports gill and overall fish health. It contains aloe vera and green tea extract to support slime coat, reduce fish stress, and encourage healing. This product begins working immediately. Since this is intended for small environments, it’s measured in drops and does not include a measuring cup. For the number of gallons of water you are able to treat per bottle, this is not a cost-effective product.

    Pros
    • Detoxifies ammonia and heavy metals
    • Reduces fish stress
    • Supports slime coat
    • Begins working immediately
    • Green tea extract reduces inflammation and improves healing

    Cons
    • Only available in one bottle size
    • One bottle only treats 15 gallons of water
    • Does not include a measuring cap
    • Not cost effective


    10. Fluval Betta Plus Water Conditioner

    Fluval Betta Plus Water Conditioner, Aquarium Water Treatment

    Bottle sizes available: 2 oz
    Dosing: 100 ml product for 10 gallons of tank water
    Detoxifies: Yes
    Supports scale health: Yes

    The Fluval Betta Plus Water Conditioner is a good product for small tanks and bowls, but it is not cost-effective for larger environments. It’s only available in one bottle size that treats less than 10 gallons of water. It neutralizes heavy metals in the water and contains herbal extracts to support fish health. This product helps reduce fish stress and support scale and fin health. It does not neutralize ammonia or nitrites in the water and, while effective, is not a budget-friendly product. For maximum efficacy and safety, the manufacturer recommends dosing the new water the night before adding it to the tank.

    Pros
    • Neutralizes heavy metals
    • Reduces fish stress
    • Supports scale and fin health

    Cons
    • Only one bottle size available
    • Not cost-effective
    • Does not detoxify ammonia and nitrites
    • Does not work quickly

    Buyer’s Guide: How to Find the Best Betta Water Conditioner

    Why is a Water Conditioner Important?

    Many people use tap water to fill their fish tank, which is completely fine. However, there are a lot of additives in our tap water, including chlorine and chloramines. There are also heavy metals, like copper, that can leach into tap water from old pipes. A water conditioner helps to eliminate chlorine and chloramine in the water, which are both deadly to fish. Some water conditioners help combat heavy metals, and others help combat toxins that can build up in a fish tank, like ammonia and nitrites.

    If you choose to use distilled or RODI water for your Betta’s home, that’s a great way to avoid chlorine, chloramines, and heavy metals. However, these types of water are stripped of minerals and electrolytes, which are necessary to the health of your Betta. Some water conditioners contain trace elements, minerals, and electrolytes that are necessary to the health of your Betta fish.

    How to Choose the Best Water Conditioner for Your Betta Fish Tank

    Your Water

    The type of water you are using in your Betta’s tank will help you choose the right water conditioner. If you’re using tap water, minerals may not be necessary to add to the water, but they are necessary to add to the water if you’re using distilled or RODI water. Minerals don’t just support the health of your Betta fish, but they can also have a direct impact on the pH of the water.

    Your Tank

    The size of your tank may be a major determining factor in choosing the right water conditioner. Some water conditioners are intended for small bowls or tanks, usually 2 gallons or less. This means that a product may be inexpensive, but it may be because it only treats a few gallons of tank water. If your Betta is in a tank that measures 10 gallons or larger, you may need to choose a product that will last you more than one or two water changes.

    Your Preference

    Some people are extremely dedicated to specific brands or to the idea of supporting a small business. Most water conditioners are effective at removing chlorine and chloramines, but they may have other features, and they may work differently from other water conditioners. This means that you will likely be choosing an effective product no matter what, but your brand preferences, purchasing preferences, budget, and additional needs will also play a part in your decision.

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    Conclusion

    The top Betta water conditioner is the API Stress Coat Aquarium Water Conditioner, which doesn’t just condition the water, but also supports the health and wellness of your Betta fish. For tight budgets, the Zoo Med Betta H2O Water Conditioner is a great option that effectively conditions water. If you’re interested in a more premium product, then you’ll like the Aquatic Experts TankFirst Complete Water Conditioner, which is an especially good pick for large tanks.

    No matter which product from these reviews that you choose, you’ll end up with an effective product. Make sure to check over all of the needs of your tank and your Betta to help you choose the best product for you.


    Featured Image Credit: Kosit Pajuthai, Shutterstock

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