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🌿 Clear your pond, clear your mind — algae doesn’t stand a chance!
Crystal Blue Copper Sulfate Algaecide is a 5-pound granular, aquatic-grade treatment with 99% pure Copper Sulfate Pentahydrate designed for effective algae control in large ponds. It rapidly targets common algae types like filamentous and string algae, working best in water temperatures above 60°F. This product is easy to apply on thick algae mats but should be used cautiously to maintain oxygen levels and avoid harm to sensitive fish species.
| Allergen Information | Abalone |
| Asin | B000RUN0T6 |
| Best Sellers Rank | #8,291 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #16 in Water Garden & Pond Treatment |
| Brand Name | Crystal Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,464) 4.4 out of 5 stars |
| Global Trade Identification Number | 00768980003335 |
| Included Components | Copper Sulfate |
| Item Form | Granules |
| Item Type Name | Algaecide |
| Item Weight | 2.24 kg |
| Liquid Volume | 5 liters |
| Manufacturer | Sanco Industries |
| Manufacturer Part Number | 333 |
| Model Number | 333 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| Unit Count | 1 Count |
| Upc | 768980003335 |
| Warranty Description | See label |
User
Quick acting and easy to use
Easy to use and starts working quickly. We love this product for our pond to make the water look great and healthy for the pond ecosystem. Will continue to purchase!
User
Cleared algae
Took a couple doses but cleared the pond over a months time
User
Clear water in two days
Works great!
User
Copper Sulfate for Pond Algae
Works well.
User
Pond algae problem
My pond is clearing up from algae after treating with this working good
User
It works
Got a very small pond you could call it a mud hole 40 ft round.Had a few bass and bream in it .Killed the fish and turned the water black after 3 days.Sprayed about a gallon on top of the algae.It definitely does what it says but I’m not so sure it is safe for fish.
User
Worked well
This worked really well but I would need 3 more bags for an acre pond.
User
Effective on aquatic weeds
Certainly helped keep the aquatic weeds down
Trustpilot
2 months ago
1 week ago