Montmorillonite Clay

(6 customer reviews)
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To order, select a Weight option. This will set the price per kilogram (2.21 lbs). Then indicate how many kilograms you want. Price per kilogram decreases as you select a larger range of weights. If you select the 500 gr package (1/2 kg), you can only order a quantity of 1.

This is the highest grade of Montmorillonite clay. There is no better clay available at any price!

This clay has been used by fish keepers around the World for years to add essential minerals to their pond or tank water, flocculate particulates leading to healthier fish with more vibrant colors and improved skin quality.

Montmorillonite Clay is sold by the kilogram.  1 kilogram of clay is 2.21 lbs. The recommended dosage is 1 Tbsp for 1,000 gals added every week. 1 kg of clay will treat about 46,000 gals of water.

Please let us know if you have any questions or comments.

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Select Weight Range, Then # of Kg Required

500 gr Package, Enter 1-5 kg, Enter 6-10 kg, Enter More Than 10 kg

6 reviews for Montmorillonite Clay

  1. Jeffery Jones

    I wish I had found your website sooner. I have been using montmorillonite for a while now and can vouch for the fast, visible positive results. But I have been paying too much! You have the best prices I have seen, by far. So I will definitely be a montmorillonite customer next time I need more. It is awesome stuff. It has a lot of uses beyond fish but I’ll stick to “fish talk” here. lol. Montmorillonite makes for happy fish, I really believe that and that makes for a happy fish keeper!

    • Don Chamberlain

      Well, I’m glad you found us now. Thanks for the feedback. There is quite a bit of information out there about the advantages of using Montmorillonite Clay, so it’s a surprise how few people use it. It’s not that expensive to use, since it takes so little, but we’re glad you like our low prices. We’ve always tried to provide superior products at the lowest possible price by eliminating fancy packaging and not spending on advertising. We depend on word of mouth like your comments, so we really appreciate you taking the time to comment.
      Happy Fish Keeping,

  2. raycooper1964 (verified owner)

    Ive been using this product for awhile in my tanks with central and south american cichlid’s, and this is an excellent product it does help with the color and quality of my fish now that i’ve found ot that I can buy it in bulk for a cheaper price i’m stoked. Thanks to Great Wave Engineering i’m set now I love using this montmorillonite clay also in my shrimp tank to aid their molting process and the snails too.
    I’m doing an unboxing on youtube Cooper’s Cichlids is the channel just to let my 1.3K followers about this great product.

    • Don Chamberlain

      Glad to get the feedback on the Clay. It seems to becoming more popular. Looking forward to you video. Thanks for spreading the word, and…
      Happy Fish Keeping,

  3. Ray Cooper

    Ive use this product before and I know the benefits of using it in our tanks I use it in my shrimp tanks and now I know I can use it all around i’ll be using it in the rest if6 my tanks this is the cheapest ive seen it so i’m glad for this site. Thanks

    • Don Chamberlain

      That’s great to hear. It seems like more and more people are becoming aware of the advantages if using Clay. It is inexpensive, but does a world of good.

      Thanks for the feedback, and…

      Happy Shrimp Keeping,

  4. Don Duran (verified owner)

    After doing some research on the use of Montmorillonite Clay for fish and shrimp, I decided to give it a try in my aquariums. Weekly supplementation at water changes using just a pinch in the smaller tanks, 1/8 TSP in my 20 gallon Amano shrimp tank, and 1/2 TSP in my 75 gallon freshwater community tank I have noticed considerable improvement in water clarity, fish color, and plant growth. I have Bettas, Cardinal Tetras, Black Neon Tetras, Phantom Tetras, Golden White Cloud Minnows, Harlequinn Rasboras, Red Cherry Barbs, and Sunset Gouramis. The Amano shrimp are molting regularly as a result of the essential minerals provided by the clay. I am very pleased with the high quality and overall benefits of the Montmorillonite Clay made available by Don at GreatWave Engineering. I highly recommend this product for “Happy Fish and Shrimp Keeping!”

    • newfish

      Thanks for the great feedback. I’m very glad you were able to observe positive results from using the Clay. Thanks, and…
      Happy Fish Keeping,

  5. JB (verified owner)

    I hadn’t ever heard of Montmorillonite Clay before seeing it here. After researching it for a bit, I figured why not. I have a 55 gallon and it says to add 1-tbsp for every 1000 gallons once a week. It roughly ratios down to 1/4-tsp to my 55 gallons (tiny bit higher, if you have 45 gallon or less, use 1/8-tsp). Within a week a started noticing a difference in the colors of my fish. I have guppies, dwarf gouramis, angelfish, tetras, and danios. Their colors darkened and became so much more vibrant; if there was multiple colors on the fish, there was a greater contrast between them so they stood out so much more. Its now been about 3 weeks and it has kept improving. One of my most favorite guppies colors improved so much it catch’s everyone’s eye. For me there were no adverse effects, everything remained the same (PH, nitrates, nitrites, etc). The only thing (which is expected) is that it made the aquarium cloudy for a few hours (I just do it at night now and it’s clear by morning). I ordered the 500-gram package and at using a 1/4-tsp once a week, it is going to last forever. I highly recommend this product.

    • newfish

      JB, Another very interesting comment. I add the clay to my koi pond hoping it’s helping, but had not witnessed a dramatic change like you report. Very glad to hear it’s working so well. Happy Fish Keeping! Don

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