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Cleansol Copper Sulphate for Pools (Algaecide)
About this item
Cleansol Copper Sulphate for Pools is 98% pure copper sulphate (blue crystal powder) – a proven algaecide that works alongside chlorine to stop green, black and mustard algae coming back. A tiny dose – about 1 g per 1,000 litres – releases copper ions that algae cannot survive, helping keep pools, fountains and water features clear and blue between chlorine doses. Packs: 1 kg, 5 kg and 25 kg bag. Supplied by Cleansol, Jodhpur, since 2002.
98% pure · Bright blue crystal powder · Dissolves fully · 24-month shelf life
First dose 1 g per 1,000 L · monthly top-up 0.5 g per 1,000 L – a 50,000 L pool needs only about 350 g a year
At a glance
| Chemical | Copper sulphate pentahydrate (CuSO₄·5H₂O), CAS 7758-99-8 |
| Purity | 98% minimum (about 25% copper) |
| Form | Bright blue crystal powder, odourless, fully water-soluble |
| Works as | Algaecide – prevents green, black and mustard algae; works with chlorine, does not replace it |
| First dose | 1 g per 1,000 litres (gives about 0.25 ppm copper) |
| Monthly top-up | 0.5 g per 1,000 litres |
| Target in pool | Copper 0.2–0.4 ppm – never above 0.5 ppm · pH 7.2–7.6 |
| Used for | Swimming pools, fountains, water features and decorative water bodies without fish |
| Packs | 1 kg · 5 kg · 25 kg bag |
| Shelf life | 24 months from date of manufacture, stored dry and closed |
How copper stops algae
When copper sulphate dissolves, it releases copper ions. These ions damage the cells of algae and stop them from growing, so algae cannot take hold on walls, steps and corners. Chlorine kills germs fast but is used up quickly by sun and swimmers; copper stays in the water much longer and keeps working as a back-up against algae between chlorine doses.
Important: copper is an algaecide, not a sanitiser. It does not kill bacteria quickly enough to keep swimmers safe, so always keep free chlorine at 2–3 ppm with TCCA 90.
Dose chart by pool size
| Pool size | First dose (1 g / 1,000 L) | Monthly top-up (0.5 g / 1,000 L) |
| 10,000 L (plunge pool) | 10 g | 5 g |
| 25,000 L | 25 g | 12.5 g |
| 50,000 L (villa pool) | 50 g | 25 g |
| 1,00,000 L | 100 g | 50 g |
| 2,00,000 L (hotel pool) | 200 g | 100 g |
| 4,00,000 L (club / 25 m pool) | 400 g | 200 g |
Pool volume (litres) = length × width × average depth (in metres) × 1,000. Use a kitchen scale – 1 level tablespoon of powder is roughly 12–15 g. Or use our Pool Calculator.
How to add it – step by step
- Test first. Bring pH to 7.2–7.6 and free chlorine to 2–3 ppm.
- Weigh the dose from the chart above.
- Dissolve it fully in a plastic bucket of water – never use an iron, steel or aluminium bucket or scoop.
- Pour slowly in front of the return inlets with the pump running, walking around the pool.
- Run the pump for at least 8 hours. Best added in the evening.
- Repeat with the half dose once a month – not the full dose.
Never add a full dose every month. Copper does not get used up like chlorine – it builds up. Too much copper is the most common reason a pool turns green or teal even when chlorine is fine, and it can stain tiles and turn blonde hair green.
Not a colour for the water. Copper sulphate does not make pool water blue at the safe dose – and adding extra "to make it blue" is an overdose that turns water green-blue, stains tiles and harms birds that drink from open pools. Blue water comes from clean, clear, well-filtered water.
"My pool turned green after adding copper" – why it happens
| Cause | What you see | What to do |
| Overdose / build-up | Clear but green-blue or teal water | Stop copper doses for 2–3 months; partly drain and refill if the colour is strong |
| pH above 7.8 | Water goes cloudy-green, blue-green stains on tiles and steps | Bring pH down to 7.2–7.4 with Cleansol pH Down; brush and filter |
| Copper added right after a chlorine shock | Water suddenly turns green or brown | Wait 24 hours after any shock before adding copper |
| Algae already growing | Slimy green walls, cloudy water | Copper prevents algae – it does not clear a green pool. Shock with chlorine first, then add copper |
Copper sulphate for swimming pools – the complete guide
Dose chart for every pool size, step-by-step dosing, algae green vs copper green, and how to fix copper-green water and stains.
Full green-pool rescue plan: Pool still green after chlorine? Cloudy water, smell and bugs – the fix.
Which pack is right for you?
| Pack | Best for |
| 1 kg | Home and villa pools, fountains – about 3 years of use for a 50,000 L pool |
| 5 kg | Hotel, society and club pools, or several pools at one site |
| 25 kg bag | Pool contractors, resorts, water parks and maintenance companies – shipping charged by PIN code |
Need copper sulphate for farming, Bordeaux mixture or lab use? See Cleansol Copper Sulphate (Neela Thotha).
Everything for crystal-clear water
Test with the pH & Chlorine Test Kit, sanitise with TCCA 90, prevent algae with Copper Sulphate, clear cloudy water with Pool Floc Powder, and shock with Sodium Hypochlorite.
Why choose Cleansol
- 98% pure: bright blue crystals that dissolve fully – no fillers.
- Honest dosing: a clear first-dose and half-dose routine that avoids the copper build-up behind most "green pool" problems.
- Trusted since 2002: supplying pool chemicals to hotels, resorts, clubs and contractors from Jodhpur.
- Long shelf life: 24 months when stored dry and closed.
- WhatsApp support from our team on 98290 05860, and a GST invoice on every order.
Safety & storage
- Harmful if swallowed. Causes skin and serious eye irritation. Wear gloves and eye protection; avoid breathing the dust.
- If it gets in the eyes, rinse with plenty of water for 15 minutes and see a doctor.
- Very toxic to fish and aquatic life. Do not use in fish ponds, aquariums or lakes, and do not empty pool water into drains that lead to rivers or ponds right after dosing.
- Do not mix with other chemicals. Use plastic buckets and scoops only – copper sulphate corrodes iron, steel and aluminium.
- Not for pools sanitised with biguanide (PHMB) instead of chlorine.
- Store in the original closed container in a cool, dry place, away from sunlight and out of reach of children.
Frequently asked questions
How much copper sulphate should I add to my pool?
First dose 1 g per 1,000 litres, then 0.5 g per 1,000 litres once a month. A 50,000 L pool needs 50 g the first time and 25 g a month after that.
Can copper sulphate clear a green pool?
No – it prevents algae but does not clear an algae bloom quickly. Shock the pool with chlorine, brush, filter until the water is clear, then add copper 24 hours later to stop it coming back.
Why did my pool turn green after adding copper sulphate?
Usually too much copper (a full dose added every month), pH above 7.8, or copper added right after a chlorine shock. Stop copper doses, bring pH to 7.2–7.4, brush and filter. If the colour is strong, drain and refill part of the pool.
Will it turn hair green or stain tiles?
Not at the correct dose with pH 7.2–7.6. Green hair and blue-green stains happen when copper goes above 0.5 ppm or pH is high.
Does copper sulphate replace chlorine?
No. Copper only controls algae. Keep free chlorine at 2–3 ppm with TCCA 90 for safe, germ-free water.
Can I add copper sulphate and chlorine together?
Yes, both can be in the pool, but never mix them in the same bucket, and wait 24 hours after a chlorine shock before adding copper.
How do I check the copper level?
Use copper test strips or a copper test kit. Keep it at 0.2–0.4 ppm; stop dosing if it is above 0.5 ppm.
Is it safe to swim after adding it?
At 0.2–0.4 ppm copper is far below the WHO drinking-water guideline of 2 mg per litre. Wait until it has fully mixed – about 4 hours with the pump running – before swimming.
Can I use copper sulphate to make the water blue?
No. At the safe dose it does not change the colour. Enough copper to tint the water is an overdose – it turns water green-blue, stains tiles, turns hair green and harms birds and fish. Blue water comes from clean, clear, well-filtered water.
Birds drink from my open pool – is it safe?
Keep copper at 0.2–0.4 ppm and never overdose. Birds also bring germs and algae spores, so keep chlorine at 2–3 ppm and skim and clean the edges daily.
Can I use it in a fountain or fish pond?
Fountains and water features without fish – yes, same dose. Fish ponds and aquariums – no, copper is very toxic to fish.
What is the difference between this and Neela Thotha?
Both are copper sulphate. This pack comes with pool-specific dosing guidance and pool-sized packs. For farming and other uses, see Copper Sulphate (Neela Thotha).
How long does it last in storage?
24 months from manufacture, kept dry, tightly closed and out of sunlight.
Do you supply hotels and pool contractors?
Yes – 25 kg bags with GST invoice and regular supply. WhatsApp 98290 05860 for bulk prices.
Copper sulphate pentahydrate (CuSO₄·5H₂O) 98%, blue crystal powder – algaecide for swimming pools, fountains and water features. Dosing information is general guidance; follow your test readings and local regulations. For bulk queries, email info@cleansol.in.
Prefer road transport? For orders of 25 kg and above, tick Send by road transport (to-pay) in the cart and add your transporter’s name and number. You pay the freight to the transporter on delivery.
Dispatched in 1–2 working days from Jodhpur. Delivery across India.
In stock
GST invoice with every order
- Ships from
- Cleansol, Jodhpur
- Sold by
- Cleansol (packed & marketed)
- Invoice
- GST invoice provided
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Specifications
| Also known as | Neela Thotha, Blue Vitriol, Copper Sulfate |
|---|---|
| Grade | Pool |
| Purity / strength | 98% min |
| CAS number | 7758-99-8 |
| HSN code | 283325 |
| Packing | 1 kg, 5 kg, 25 kg bag |
Typical values for reference only, not a guaranteed specification. Exact values vary by batch and manufacturer.
Applications & industries
- Algae control in pools & fountains
Storage & handling
Safety & first aid
Technical support & disclaimer
For usage, dosage, or formulation guidance, email info@cleansol.in or WhatsApp +91 98290 05860.
Specifications are typical values for reference only. Users must verify suitability and comply with applicable regulations before use. This product is intended for professional and commercial use; the buyer is responsible for safe handling, storage and disposal. Cleansol assumes no liability for misuse.