Attributes

Brand	-
Category	Sports, Yoga, Fitness & Fan Gear / Pool Equipment
Origin	-
Chemical Formula	CuSO4·5H2O
Grade	AR (Analytical Reagent)
Appearance	Bright Blue Crystals
Purity	≥ 99.0%
Primary Use	Pool Algaecide & Fungicide
Solubility	Highly Soluble in Water
Package Weight	1 kg (2.2 lbs)
Storage Condition	Cool, Dry, Ventilated Area
Safety Warning	Harmful if Swallowed; Keep Away from Children
Origin	USA

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Fast shipping and secure packaging

Arrived well-sealed in a double-bagged container. No leaks or spills. The blue vitriol crystals are uniform and bright. Highly recommend for pool owners looking for an effective solution.

Anonymous

Mar 25, 2026

Rating: 5/5

Best bang for your buck

I have used this for three seasons now. A little goes a long way. It keeps the algae at bay much longer than the standard chlorine shocks alone. Will buy again.

Anonymous

Mar 21, 2026

Rating: 5/5

Excellent for clearing green pools

This copper sulfate worked wonders on my algae problem. The crystals dissolved quickly and the water cleared up within 24 hours. Great value for the price compared to liquid algaecides.

Anonymous

Mar 18, 2026

Rating: 4/5

Solid product for maintenance

Great for preventative maintenance in the summer. Dissolves completely without leaving residue if stirred properly. Deducting one star because the label instructions could be more detailed for beginners.

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality reagent grade

Bought this for a school science project and some minor pool maintenance. The purity seems high as advertised. Just be very careful with measurement as it is potent.

Anonymous

Mar 09, 2026

Rating: 3/5

Works but requires caution

The product does what it says, but you really need to follow the dosage instructions strictly. I added a bit too much initially and had to dilute the pool. Effective but handle with care.

5 FAQ

Q: Can I dissolve this in a bucket before adding it to the pool?

A: Yes, it is best practice to pre-dissolve the crystals in a plastic bucket of warm water before distributing the solution around the pool perimeter. This ensures even distribution and prevents staining.

Q: What protective gear should I wear when handling these crystals?

A: We strongly recommend wearing chemical-resistant gloves, safety goggles, and a dust mask when handling the crystals to prevent skin irritation, eye contact, or inhalation of dust.

Q: How much of this product should I add to a 10,000-gallon pool?

A: For general algae prevention, we recommend adding approximately 0.5 to 1 pound per 10,000 gallons, depending on current water conditions. Always test your water first and follow local safety guidelines.

Q: Does this expire or lose potency over time?

A: If stored in a cool, dry place with the container tightly sealed, Copper Sulfate Pentahydrate has an indefinite shelf life. It may clump if exposed to humidity but remains chemically effective once dissolved.

Q: Is this safe to use if I have fish in an attached pond?

A: No, copper sulfate is highly toxic to aquatic life including fish and invertebrates. Do not use this product if your pool drains into or is connected to a natural pond or waterway containing fish.

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