Hanna Alk Checker Reading High

[eastgill]

Hi all,

Has anyone had issues with their Hanna alk checker reading high? Mine’s reading in the 10s, but I don’t dose anything and the water I’m doing water changes with is reading in the mid 9s. I buy the water from my LFS and do about a 25% water change every week or so. Any reason why my alk would go up without me dosing anything, or is my checker wonky? Maybe I’m not testing right? Appreciate any thoughts!

 

[Saltyreef]

Are you comparing it to your new water you mixed? What are you using to measure salinity?

 

[mmorrison55]

Unless your reagent is really old, there’s a good chance your readings are accurate.

If in doubt, pick up a salifert kit to compare.

Do you know what salt your LFS uses? They could be using a brand with a higher alk ratio for coral growth.