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Bettawan : Catechu Bark (Acacia Catechu)

Catechu Bark great for simulating black water condition.




Both the amateur and professional Aquarist also use Catechu Bark to mimic the natural conditions of their fish in their aquarium.

As with Indian Almond Bark, if your fish comes from a habitat where leaves and other plant debris regularly falls into the water and decompose, your fish will be happier in that environment so trying to mimic it in your aquariums is strongly recommended. Leaves and bark that fall into the water release many different compounds, from dyes to trace minerals, and fish living in the water adapt to having different compounds readily available. If your fish comes from the type of environment described above, Catechu Bark is one way of stimulating black water condition which is the natural environment for most tropical fish.

Making your own Catechu Bark Blackwater Extract is pretty much straight forward:

1st you need a bag of Bettawan Catechu Bark (Acacia Catechu)
Next you need a pot big enough to hold at least 1 gallon of water, but the bigger the pot the more extract you will produce. Put 25g - 75g of Bettawan Catechu Bark for each gallon of water inside the pot.
Fill the pot with clean water.
Let the Catechu Bark soak in the water for 24 hours. It's best to put some type of weight on top of the Catechu Bark to stop it floating.
The following day boil the pot of Catechu Bark for 15-20 minutes. Put to one side and let it cool and stew for another 24 hours. The next day boil the pot again for 10-15 minutes.


Once the water as cooled you will notice that the water is black with a very strong fragrance. Filter the Catechu Bark blackwater extract through a coffee paper filter or an old pair of tights. This is to stop any undesirable matter getting into the blackwater extract.
The Catechu Bark blackwater extract can now be poured into plastic or glass bottles, sealed and stored in fridge or somewhere dark and cool. Great for simulating blackwater condition in the aquarium.


1. Addition of Trace Minerals ( 100% Natural )
2. Anti-Inflammatory. Prevents and Cures diseases in fish (100% Natural ) 
3. Healing Agent ( 100% Natural )
4. Induces breeding in Betta fish ( 100% Natural )
5. Water Conditioner ( 100% Natural )
1 Ounce for 1 gallon of water.

Catechu Bark

  • Ideal for making your own Blackwater Extract or simply place into your tank

    100% Dry, Clean and Insecticide Free


       25g = $18               

       50g = $21.50         

       75g = $25.25         

     100g = $29.25        

     200g = $41.25

     300g = $53.50

     400g = $63.50

     500g = $71.50

    1 Kilo = $98.50

    ​All prices include Tracking Number and Registered Airmail Shipping.

    • The Catechu Bark is bagged in clear plastic bags and boxed in sturdy boxes supplied by the Thai post office.
    • We will ship the item to the shipping address you provide. Please make sure your shipping address and zip code is correct and up to date.
    • We offer FREE International shipping with all our products.
    • The package will be shipped directly from Thailand. We use the International small packet and International parcel airmail services supplied by the Thai post office. Both services offer tracking numbers. Parcels usually take 12 - 14 working days to arrive once shipped.

    • Orders will normally ship within 5 days after payment has been cleared.

    • Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.

    • Please check with your countries customs to determine what these additional costs will be before buying.


    We do not accept returns.

    If a customer contacts us before shipping and wants to cancel their order for whatever reason then we will issue a full refund.

    If a customers parcel has been shipped and stopped by customs or has been returned to us for whatever reason a refund will be issued minus the shipping charge or the contents will be re-prepared and reshipped to the customer but the customer has to pay the re-shipping charge.

    Orders that go missing for whatever reason and no proof can be shown will not be refunded.

    ​We aim to supply a fast friendly service with quality product's in a professional manner. 

    Thank you for visiting my Bettawan website. ​

    Best Wishes


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