Pond & Lake Supplies

Copper Sulfate Pentahydrate 99% Crystals - 10 Lbs.

Copper Sulfate

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Copper Sulfate Crystals

  • A versatile farm chemical:
  • Pest control - snails and slugs
  • Pond cleaner - algae, mosquito larvae
  • Natural fungicide mildew
  • Antiseptic - household germs
  • Organic Bordeaux mix - blight, apple scab, leaf curl, etc.);
  • Remove old tree stumps (bore a hole and insert
  • Kill roots clogging septic tank pipes - flush down the toilet.
  • Wood and canvas preservative (prevents dry rot),

...or simply grow lovely blue crystals.

 Usage: For pipeline systems (toilets, etc.) - 1 cup down drains every 2 weeks or 2 cups per month. 

EPA Reg: 829-210

AK

Customer Reviews

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Based on 10 reviews Average Rating 5.00 stars out of 5
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  • s
    shawn jacobson S. J. shawn j.
    27-07-2025

    Great value

    Thanks for sending genuine product in a timely fashion!

  • M
    Michael VerValin M. V. Michael V.
    22-01-2025

    Copper Sulfate and then some…..

    When something is called for on the job , nothing beats a good website, product, price, packaging and delivery! Top flight in all regards. Keep up the good work, it doesn’t go unnoticed. Thanks!

  • J
    John Cockerham J. C. John C.
    17-10-2024

    Easy order

    No fuss, no problem - easy order.

  • C
    Chuan Wong C. W. Chuan W.
    11-09-2024

    Shipped Fast

    Well packed. Thanks

  • E
    Eric myers E. M. Eric m.
    21-08-2024

    Copper sulfate

    The product shipped and arrived very quickly. Thank you!

  • L
    Linda Chewning L. C. Linda C.
    06-05-2024

    Seed

    Thank “You”!

  • L
    Leora Worthington L. W. Leora W.
    10-10-2023

    Excellent service

    Arrived quickly. The packaging was perfect for me to store it safely on a cabinet shelf.

  • M
    Marc Desruisseaux M. D. Marc D.
    30-09-2023

    Great product!

    Great product ! Great service ! I use this in my pool to remove algae. just a few ounces Works fast and well on a 25,000 gallons poor. A small bag of Stop Yellow with a few ounces inside at the pool store costs over $7 compare to 10 lbs here.

  • G
    Gary Benson G. B. Gary B.
    20-10-2022

    Arival Ontime ?

    Great service, expedited shipping, 5 ***** Great Job Seed World.... :0]

  • K
    Kathryn A Bradd K. A. B. Kathryn A. B.
    20-09-2022

    Reliable company

    The order was processed and shipped very efficiently. The product was super well packaged to avoid damage.

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Category: Copper Sulfate Crystals

Type: Copper Sulfate

Brand: Copper Sulfate


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Description

Copper Sulfate Crystals

  • A versatile farm chemical:
  • Pest control - snails and slugs
  • Pond cleaner - algae, mosquito larvae
  • Natural fungicide mildew
  • Antiseptic - household germs
  • Organic Bordeaux mix - blight, apple scab, leaf curl, etc.);
  • Remove old tree stumps (bore a hole and insert
  • Kill roots clogging septic tank pipes - flush down the toilet.
  • Wood and canvas preservative (prevents dry rot),

...or simply grow lovely blue crystals.

 Usage: For pipeline systems (toilets, etc.) - 1 cup down drains every 2 weeks or 2 cups per month. 

EPA Reg: 829-210

STATES NOT REGISTERED

AK

Reviews

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