Palintest Calcium Hardness (Calcicol) Test Tablets – 250 Pack (AP252) for Pool & Spa Water Testing

Palintest AP252 Calcicol tablets measure calcium hardness in pool and spa water using Palintest photometers and compatible photometric test systems. Correct calcium hardness prevents scaling on pool surfaces and equipment, as well as corrosion from water that is too soft. Each pack contains 250 individually foil-sealed tablets.

Key Features

• Tests: Calcium hardness
• 250 individually foil-sealed tablets per pack — extended shelf life
• Compatible with Palintest Pooltest photometers and approved photometric systems
• Prevents scaling (high hardness) and corrosion (low hardness)
• Part number / Palintest code: AP252

Compatible Test Equipment

• Palintest Lumiso Pooltest 6 Photometer
• Palintest Lumiso Pooltest Expert Photometer Kit

Related Palintest Test Tablets

Hardness Testing

• Palintest Calcicol (AP252) – Calcium Hardness, 250 Pack — this product
• Palintest Hardicol (AP254) – Total Hardness, Photometer, 250 Pack

pH Testing

• Palintest Phenol Red (AP130) – pH, Photometer, 250 Pack
• Palintest Phenol Red (AK131) – pH, Comparator Use Only, 250 Pack

Alkalinity Testing

• Palintest Alkaphot (AP188) – Total Alkalinity, Photometer, 250 Pack
• Palintest Alkavis (250F) – Total Alkalinity, Rapid, 250 Pack

Chlorine Testing

• Palintest DPD 1 (AP011) – Free Chlorine, Photometer, 250 Pack
• Palintest DPD 3 (AP031) – Total Chlorine, Photometer, 250 Pack
• Palintest DPD XF (AP013) – Extended Free Chlorine, Photometer, 250 Pack
• Palintest DPD XT (AP033/1) – Chlorine, Photometer, 250 Pack
• Palintest DPD Oxystop (AP017) – Removes MPS Interference, 250 Pack

Other Parameters

• Palintest Bromine (AP060) – Bromine, Photometer, 250 Pack
• Palintest Cyanuric Acid (AP087) – Stabiliser Level, Photometer, 250 Pack
• Palintest Copper (AP187) – Copper, Photometer, 250 Pack
• Palintest Chloride (AP268) – Chloride, Photometer, 250 Pack

Specifications

• Part Number: AP252
• SKU: RE-AP252
• Parameter: Calcium Hardness (Calcicol)
• Pack Size: 250 tablets
• Format: Individually foil-sealed tablets
• Brand: Palintest
• Condition: New

Frequently Asked Questions

What is the difference between Calcicol (AP252) and Hardicol (AP254)?

Calcicol (AP252) measures calcium hardness specifically. Hardicol (AP254) measures total hardness, which includes both calcium and magnesium. For pools, calcium hardness is the more commonly monitored parameter.

What is the ideal calcium hardness level for a pool?

The recommended calcium hardness range for pool water is generally 200–400 ppm. Below this range, water becomes aggressive and may corrode pool surfaces and equipment. Above this range, calcium can precipitate and cause scale on pool surfaces and filtration equipment.