Talk with the Expert | International and European shipping | Free Shipping for Orders over 69€ | Shipping within 24 hours
Alkalinity Pro Refill – High-Precision KH Refill Test for Marine Aquariums (75 Tests)
Alkalinity Pro Refill is the official replacement reagent set for the Red Sea Alkalinity Pro Test Kit, designed to measure carbonate hardness (KH) in marine aquariums with outstanding accuracy. With a resolution of 0.05 meq/l (0.14 dKH), it is ideal for maintaining proper buffer capacity and pH stability in reef systems.
The refill provides enough reagent for 75 tests and is intended for aquarists already using the complete Red Sea Alkalinity Pro Kit. Accurate KH monitoring is essential for coral health, especially in SPS-dominant or mixed reef tanks.
Main features:
75-test refill for Red Sea Alkalinity Pro Kit
Extremely precise: 0.05 meq/l (0.14 dKH)
Ideal for marine and reef aquariums
Ensures pH stability and proper coral growth
For use with Red Sea Alkalinity Pro only
Why choose Alkalinity Pro Refill:
Ideal for maintaining consistent KH levels in reef tanks, it supports coral health and color by ensuring optimal water chemistry, making it essential for serious reef keepers.
English 
Italiano 
