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🌿 Clear waters, zero algae—because your pond deserves the best!
Crystal Blue Copper Sulfate Algaecide is a 5-pound granular, aquatic-grade treatment with 99% pure Copper Sulfate Pentahydrate. Designed specifically for large ponds and water bodies, it effectively controls filamentous and string algae when water temperatures exceed 60°F. Ideal for professional and serious pond managers, it requires careful dosing to maintain aquatic oxygen levels and is not safe for sensitive fish species like Koi or Goldfish.
| ASIN | B000RUN0T6 |
| Allergen Information | Abalone |
| Best Sellers Rank | #3,669 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #19 in Water Garden & Pond Treatment |
| Brand | Crystal Blue |
| Brand Name | Crystal Blue |
| Customer Reviews | 4.4 out of 5 stars 2,407 Reviews |
| Global Trade Identification Number | 00768980003335 |
| Included Components | Copper Sulfate |
| Item Form | Granules |
| Item Type Name | Algaecide |
| Liquid Volume | 5 Liters |
| Manufacturer | Sanco Industries |
| Manufacturer Part Number | 333 |
| Model Number | 333 |
| Target Species | Fish |
| UPC | 768980003335 |
| Unit Count | 1.0 Count |
| Warranty Description | See label |
F**S
This product works
I love this product. I use to open my swimming pool. It works well. Clears my water quick and helps opening my pool and getting it ready for the summer season. It’s a good value, water clarity is amazing, and removes algae quickly.
D**E
Pond algae problem
My pond is clearing up from algae after treating with this working good
O**.
Copper sulfate
Used in toilet for. Lear flushing! Works excellent!!
S**N
Works as it should
Good stuff but hard to determine how much to use. Sprinkling uses too much but you can dissolve in water and spray
M**H
This is a great product !
I have a 400 gallon pond with a waterfall and I always had an algae issue until I bought this. I know I poured a little too much in but I was thinking "what the heck". The pond was cloudy for a few days and then it cleared the water up and now it looks fantastic! Crystal clear. What a great product ! I would highly recommend this to anyone who has a pond with an algae problem !!!
R**R
Pond
It works great.
P**T
Toxic to humans
Works with constant application, that being said, very expensive Make sure you don't touch or breath product.
K**R
As advertised
Arrived as advertised
Trustpilot
1 month ago
2 weeks ago