• PoolWaterLAB Total Alkalinity reagent tablets (50) for pool photometer testing, front of pack
  • PoolWaterLAB Free Chlorine reagent tablets (50) for pool photometer testing, compatible photometer test setup
  • PoolWaterLAB Free Chlorine reagent tablets (50) for pool photometer testing, close-up of tablets
  • Video tutorial showing how to test Total Alkalinity using a pool photometer and reagent tablets
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Alkalinity-M Reagent Tablets (50) – for Pool Photometers

Alkalinity-M Reagent Tablets (50) – for Pool Photometers

$13.99 USD
$15.99 USD $13.99 USD
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  • Made in Germany for the US market
  • Item is located in the USA and ships from the USA. Orders ship within 24 hours. Free shipping on orders over $100. To find out the cost of worldwide shipping, simply add items to your cart and enter your shipping details — the rate will be calculated automatically

Which photometers are these reagents compatible with

The reagents are compatible with our entire family of photometers

  • PoolWaterLAB v2.0
  • PrimeLab v2.0
  • PrimeLab v1.0
  • PoolLab 1.0
  • PoolLab 2.0

Alkalinity-M Reagent Tablets are photometer-compatible replacement / refill reagent tablets used for accurate pool & spa testing. Designed for routine alkalinity checks and restocking your testing supplies.

Key Specs

  • Product type: Replacement / refill reagent tablets (consumable)
  • Test parameter: Total Alkalinity
  • Format: Tablet reagent (50 tablets)
  • Shelf life: 2 years (sealed, stored properly)

What this reagent does

Alkalinity-M is a reagent used by compatible photometers to measure Total Alkalinity (acid capacity / bicarbonate buffering) in pool and spa water.

Storage & shelf life

Store tablets cool, dry, and sealed. Avoid humidity and heat.

  • Recommended storage temperature: 59-77°F (15-25°C)
  • Protect from: moisture/water and direct heat

Proper storage helps maintain accuracy and supports the stated shelf life.

Material Safety Data Sheet (MSDS) — Download

Note: Product performance depends on correct testing procedure and proper tablet storage.

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