Best Pool Chemicals & Testing UK (2026) — Page 3

Pros

• 5kg tub covers a full season of dosing for most family pools
• Stabilized formula resists rapid breakdown from UV sunlight
• Fast-dissolving granules keep water clear with minimal scrubbing

Cons

• Strong chlorine smell on opening, so ventilate storage areas

Pros

• Adjustable dial controls how fast chlorine tablets dissolve
• Includes 10 multifunctional 20g tablets plus free test strips
• Floats freely so it doubles as an easy visual water-treatment check

Cons

• Tablets can take a while to dissolve fully in cooler water

Pros

• Rapidly dissolving granules disinfect pools and hot tubs quickly
• Trusted UK brand widely used for day-to-day chlorine top-ups
• Highly rated with a large base of verified reviews

Cons

• Hazard warnings mean careful handling and storage away from children

Pros

• Tests free chlorine, total alkalinity and pH in one easy strip
• Instant colour-match results take the guesswork out of dosing
• Pack of 50 strips covers a full season of regular testing

Cons

• Colour chart can be tricky to read in bright direct sunlight

Pros

• Reads chlorine, bromine, pH and alkalinity in one quick dip
• 50 strips last a full season of regular water checks
• Colour chart is simple to read against the pack itself

Cons

• Strips need reading within seconds for the most accurate colour match

Pros

• Clears green and mustard algae without heavy foaming
• Compatible with chlorine and bromine sanitising routines
• Small dose treats a good volume of pool or hot tub water

Cons

• Best used little and often rather than as a one-off algae fix