With many different kits for testing alkalinity . I’m not sure which one to trust .
salifert results 7.3dkh but using a syringe that might be from a old Red Sea kit
api kit that expires 2017 which results are 7 dkh ( drops )
Hanna 137ppm ( 7.62dkh ) started to test higher a few months ago but not sure to trust it or not but I think I might have found the testing error with a few numbers rubbed off , I was adding 0.9ml reagent
salifert results 7.3dkh but using a syringe that might be from a old Red Sea kit
api kit that expires 2017 which results are 7 dkh ( drops )
Hanna 137ppm ( 7.62dkh ) started to test higher a few months ago but not sure to trust it or not but I think I might have found the testing error with a few numbers rubbed off , I was adding 0.9ml reagent