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Kasco Macro Zyme Time Release Block Beneficial Bacteria Pack of 2 | Muck Remover for Ponds & Lakes | Non-Chemical Lake & Pond Treatment for Eliminating Sludge & Odors | Treats Up to 6 acre-feet 12 lb.

5.0 (8) Write Review
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$179.00

$ 86 .99 $86.99

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About this item

  • Pond Muck and Sludge Remover: Kasco’s Macro-Zyme Muck Block pond equipment is the perfect choice to control and eliminate sludge and foul odors in tanks, ponds, and lakes. Once introduced, this pond cleaner for outdoor ponds quickly releases billions of beneficial organisms and enzymes to reduce muck, neutralize odors, and clean your water!
  • Clear, Neutralize & Purify Water: Our Macro-Zyme pond muck remover rapidly eliminates dead grass, leaves, fish waste, and sludge through increased decomposition. Macro-Zyme sludge treatment can reduce odors in 24 hours or less and decrease nitrates and phosphates to help restore a healthy oxygen level.
  • Large Treatment Area: This 12 lb. Pack of 2 Time Release Block of Macro-Zyme treats up to 6 acre-feet square feet of water per block and has a shelf life of two years. Use directly into your pond or lake without hassle or needing extra equipment. For best results, refer to the attached product document for all information.
  • Non-Chemical, Safe Formula: Our muck removal blocks are made without chemicals to guarantee their safety for humans, fish, wildlife, and livestock. No fillers or other non-aquatic ingredients are included in our pond supplies to ensure the highest quality.
  • A Perfect Solution for a Cleaner Lake & Pond: Digests and removes nutrients without chemicals as well as pond scum and floating particles. Eliminates animal waste, dead grass, and foul smells through increased decomposition. Safe for people, pets and livestock and no irrigation restrictions or permit required.



Mr. Lancaster
Reviewed in the United States on March 27, 2025
These seem to last a little longer than the other muck blocks I've purchased for cheaper. Results are slow but water clarity has improved, the water color even seems to be less muddy. (I have used multiple products) I haven't had any damaged ones arrive.
S. L. Horton
Reviewed in the United States on March 29, 2024
I’ve used this for years. It is a great product. However, the last two orders were basically powder. This might be from shipping, maybe a decline in quality, but, either way, at this price I cannot continue to buy the product. FYI I did have to speak with support early on and they’re great, so it is a shame to see this happening.
Michelle Thompson
Reviewed in the United States on November 30, 2024
Last June we put 2 in our cove. 5 months later, the water level has been lowered for winter and it exposed 1 of them. It has not dissolved at all and we have not noticed a decrease in muck. We snorkled and checked on them periodically this summer. No changes.I will change my review if they start to work next summer.
Billy
Reviewed in the United States on September 30, 2023
Product will definitely work wonders in a farm pond, just not overnite. By patient and be rewarded.
Rebecca Pollack
Reviewed in the United States on July 12, 2023
It works, hands down. I have used multiple products in my 2 1/2 acre pond, which had minimal results, but this product worked fast without harming any aquatic life. I will certainly buy this product again.
Kurtis
Reviewed in the United States on May 25, 2023
Hard to tell if it is working but the water does seem clearer
Capt. Geoff
Reviewed in the United States on July 5, 2022
Dropped the block into my channel July 1 and it appears to be working as bubbles are coming up in the area. By the end of the month, I will know if it is making a difference.
Jann DeMars
Reviewed in the United States on December 1, 2020
I have treated my 100 x 300 ft. pond for over 20 years. The science of a pond changes with age. I've treated my pond with several muck removers including products from The Pond Guy, Lake Restoration, etc. I've used pellets & packets and algae control totaling over $2k annually. I stared using this muck block and placed a block @ each of my diffusers. (I also raised my diffusers by 12" by tying them to plastic milk crates for best aeration) I added and additional block in the center of my pond every 2 weeks acting like a shocker as you would a pool. MY POND LOOKS MAGNIFICENT.! In some areas of my pond I had muck/sludge up to 12+ inches. NOW IT'S GONE! With the loss of muck, the algae has diminished by 90%. I can't wait to see what my maintenance will look like next year. I used to hire teenagers to rake muck & algae 4x a year and never could get on top of the growth. In addition to the muck block, I occasionally needed to add some cutrine granular and occasional spray cutrine. Now it's about a cutrine application every 30 days (minor application) instead of a major investment weekly. I CAN'T RECOMMED THIS PRODUCT ENOUGH! Also, we have fish and a beach for swimming. SAFE FOR ALL.