Potassium Permanganate vs. Copper Sulphate vs. Pool-Grade Algaecide – What’s Best for Your Frame Pool?
- Ronak Raval
- Aug 10
- 3 min read
One of the most common questions we get from pool owners is:"Can I use potassium permanganate or copper sulphate instead of a regular liquid algaecide?"

If you’re a pool owner — especially of a Bestway or other above-ground frame pool — here’s everything you need to know before making that choice.
1. Understanding the Options
A) Potassium Permanganate (KMnO₄)
Potassium permanganate is a strong oxidizing chemical. In theory, it can kill certain algae and bacteria by oxidizing organic material in the water. However:
Non-selective action: It reacts with any organic matter, not just algae.
Risk of staining: Can turn liners brown or black and discolor fittings.
Residue issues: Leaves manganese deposits in water.
Dosing difficulty: In smaller pools, even a slight overdose can cause damage.
In short: While it can kill algae, it is not liner-friendly and carries a high risk of overdosing in frame pools.
B) Copper Sulphate (CuSO₄)
Copper sulphate works by releasing copper ions, which disrupt algae’s ability to grow. It’s been used for decades in ponds and fountains — but there are catches:
Copper buildup: The copper doesn’t evaporate or disappear; it stays in your pool water.
Staining risk: Over time, it can cause blue-green stains on PVC liners and fittings.
Irritation potential: Higher concentrations may irritate skin and eyes.
pH dependency: Effectiveness drops if pH isn’t kept in a narrow range.
While effective in killing algae, copper sulphate’s side effects make it a risky long-term solution for above-ground pools.
2. Why Pool-Grade Algaecide is Different
A proper pool-grade algaecide is formulated specifically for swimming pools, especially Bestway-compatible above-ground frame pools. It’s designed to work safely and effectively without damaging liners, fittings, or filtration systems.
One excellent example is GreenZap™ – Algaecide Liquid (5L), available from Bestway Gujarat.

GreenZap™ at a Glance:
Type: Non-foaming liquid algaecide, formulated for pool use.
Key Benefits:✅ Liner-safe — no staining or discoloration.✅ Non-metallic — no copper or heavy metals to build up in the water.✅ Chlorine-compatible — works perfectly alongside your sanitizing system.✅ Preventive and curative — tackles existing algae and prevents new growth.
Ease of Use: Clear dosing instructions make it simple for any pool owner to maintain ideal water conditions.
Packaging: Robust 5L HDPE container for easy handling and storage.
In tropical climates like Gujarat, where warm water and sunlight create ideal conditions for algae growth, GreenZap™ provides consistent, reliable protection without the drawbacks of harsh oxidizers or metallic treatments.
3. The Verdict for Frame Pools
Yes, potassium permanganate and copper sulphate can kill algae. But for Bestway or any frame pool, the risks outweigh the benefits. Stains, residue buildup, irritation, and maintenance challenges make them poor choices compared to a dedicated pool-grade algaecide.
For long-term clarity, safety, and liner protection — stick to products designed for pools.And if you want a safe, effective, and easy-to-use solution, GreenZap™ Algaecide Liquid is our top recommendation for Bestway and other frame pool owners.
💧 Need help choosing the right algaecide for your pool?Contact Bestway Gujarat by mQube today — we’ll guide you on the safest, most effective way to keep your pool sparkling clear all year round.
📞 Call / WhatsApp: +91-96645 22268 | +91-83207 73956🌐 Website: www.bestwaygujarat.com
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