Red Sea reef tests accuracy

[Doob]

I have a hard time maintaining stable ALK, or so I thought. I just got a salifert ALK test in today since my Red Sea titration kit is nearly gone. I measured using both tests tonight, Red Sea measured 9dKH and the salifert read 11.95 dKH.

The Red Sea always seemed to show swings that didn't make sense. The calcium too.

I don't know what to believe anymore!

 

[GoVols]

I have never used the Salifert alk.
The Red Sea Pro alk and cal have always been good for me.

I did get a bad Red Sea Pro cal refill for the first time (Ever) but my new refill is spot on.
http://www.reefcentral.com/forums/showthread.php?t=2626940

If you use the RSP mag then I'd suggest going with the Salifert mag. The RSP mag would give myself readings up to 100-ppm too high.

 

[ReeferSurf]

Sure you red sea isnt expired?

I just went to find my testing the other day before sending off a triton. used the hanna check 7.4, salifert 7.7 , redsea 7.6.

my redsea isnt the orange color like i see in videos, its a brown tint color card and the water hits a tint of blue to brown i stop. (guessing new redsea kit)

 

[GoVols]

Sure you red sea isnt expired?

I just went to find my testing the other day before sending off a triton. used the hanna check 7.4, salifert 7.7 , redsea 7.6.

my redsea isnt the orange color like i see in videos, its a brown tint color card and the water hits a tint of blue to brown i stop. (guessing new redsea kit)

Yes,
RedSeaKev says.. to stop at the color change endpoint and they really need to update that old video.

 

[Doob]

It's not expired. I do always return my unused titration reagent to the bottle. Is that a no no?

 

[GoVols]

It's not expired. I do always return my unused titration reagent to the bottle. Is that a no no?

RedSeaKev says that is a no no.

but... (lol) I return it back to the bottle.