Palintest Alkalinity (Alkaphot) Total Test Tablets – 250 Pack (AP188) for Pool & Spa Water Testing

Palintest AP188 Alkaphot tablets measure total alkalinity in pool and spa water using Palintest photometers and compatible photometric test systems. Correct total alkalinity is essential for pH stability, corrosion prevention, and overall water balance. Each pack contains 250 individually foil-sealed tablets.

Key Features

• Tests: Total alkalinity
• 250 individually foil-sealed tablets per pack — extended shelf life
• Compatible with Palintest Pooltest photometers and approved photometric systems
• Essential for stabilising pH and preventing corrosion and scaling
• Part number / Palintest code: AP188

Compatible Test Equipment

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

Related Palintest Test Tablets

Alkalinity Testing

• Palintest Alkaphot (AP188) – Total Alkalinity, Photometer, 250 Pack — this product
• Palintest Alkavis (250F) – Total Alkalinity, Rapid/Comparator, 250 Pack

pH Testing

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

Hardness Testing

• Palintest Calcicol (AP252) – Calcium Hardness, 250 Pack
• Palintest Hardicol (AP254) – Total Hardness, Photometer, 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: AP188
• SKU: RE-AP188
• Parameter: Total Alkalinity (Alkaphot)
• Pack Size: 250 tablets
• Format: Individually foil-sealed tablets
• Brand: Palintest
• Condition: New

Frequently Asked Questions

What is the difference between Alkaphot (AP188) and Alkavis (250F) alkalinity tablets?

Alkaphot (AP188) is the photometer-compatible total alkalinity reagent for use with Palintest photometers. Alkavis (250F) is a rapid-dissolving formulation for colorimetric comparator testing. Choose based on the test equipment you use.

Why is total alkalinity important in pool water?

Total alkalinity acts as a buffer for pH, preventing rapid pH swings. Correct alkalinity (typically 80–120 ppm for pools) stabilises pH, protects pool surfaces and equipment from corrosion or scaling, and ensures disinfection chemicals work effectively.