Premier Blue 4-in-1 Multifunctional Chlorine Tablets - Pool & Hot Tub (20g)

4-in-1 multifunctional chlorine tablets for pools and hot tubs. Each 20g tablet sanitises, stabilises, clarifies and treats algae in one go — so you can stop juggling four different chemicals.

Drop them into your skimmer, floating dispenser or chlorine feeder and let them dissolve slowly over 3 to 7 days. Less faff, fewer chemical bottles, clearer water.

What each tablet does

• Sanitises — high-strength chlorine kills bacteria and keeps water hygienic
• Stabilises — built-in cyanuric acid stops UV burning off your chlorine in summer sun
• Clarifies — coagulates fine particles your filter can’t catch on its own
• Tackles algae — algaecide blended in to stop green water before it starts

Why we like them

• Higher pH formulation — less time topping up pH up, more time swimming
• Slow-dissolving — one dose lasts a week in most setups
• Same tablets we use ourselves — we sell loads of these every season, customers keep coming back
• Sized for everything — pick a small pack for a hot tub, or a big tub for a full season’s pool dosing

Pack sizes

Sold by tablet count. Each tablet weighs 20g, so 50 tablets = 1kg.

• 5 tablets (100g) — trial size, ideal for a hot tub
• 10 tablets (200g) — small hot tubs / paddling pools
• 20 tablets (400g) — one season for a small above-ground pool
• 50 tablets (1kg) — standard pool tub, the most popular size
• 100 tablets (2kg) — full season’s supply for medium pools
• 250 tablets (5kg) — bulk buy for larger pools or sharing across the season

How to use

1. Place tablets in your skimmer basket, floating dispenser, or in-line chlorine feeder.
2. Start with 1 tablet per 1,000 litres of pool water as a guide, then adjust based on test readings.
3. Test chlorine and pH at least twice a week and top up tablets as they dissolve.

Specs

Safety

• Never drop tablets directly into the pool — they can bleach or stain the liner.
• Never mix with other pool chemicals or household cleaners. Trichlor reacts dangerously with calcium hypochlorite, ammonia, and bleach.
• Store in original tub, dry, away from kids and pets. Keep the lid sealed.
• If swimmers report stinging eyes or strong chlorine smell, you may need to shock the pool to clear chloramines — that’s a separate product, just shout if you need help.

Free UK mainland delivery

Same-day dispatch on orders before 2pm. Got questions about dosing or which pack suits your pool? Drop us a message, happy to help.