I just ordered a bucket of CoraLife since I liked the params posted. I especially liked the 9 DKH since that is my new target level. I rolled around the bucket to get it mixed up, and made saltwater at 35PPT measured with a refractometer. My results were...
ALK 13.8 measured with 2 different Salifert kits
Cal >500 salifert
Mag 1350 salifert
The magnesium and calcium were close to what was posted on the sticky, but the Alk was way off. I am a little disappointed with this because I switched to this salt from IO because IO was getting alk of around 12.5.
That's a surprise to me;I'd be disappointed too.If it's a Salifert alk test kit ,they do test high more often than not in my experience.
I've used coralife for 8 years. The alk has been consistent around 9.
I can confirm that the higher dKH is there. I too have been using Coralife for quite some time. It has always been a good salt for me, and I will continue to use it, if I can confirm somehow that this is isolated
I have been having some trouble with corals TNing from the tips. I have tried everything to figure out what my problem was, and now I think that I have found it
I mixed up a fresh batch yesterday, and decided to do some tests on the fresh batch. I will admit that I got so comfy with the Coralife salt that I had stopped checking every batch. My new procedure with be to check every new bucket that I open
So anyway, the tests that I did came out like this.......
Ca = 550-560 (Elos)
KH = 13-14

(API, Elos, Tropic Marin, Sera, Salifert)
Mag = 1350 (Elos)
Billybeau. I don't know what you think, but it may be time to obtain some fresh coralife to check for yourself. It seems as though they have either changed the Alkalinity in the saltmix, or made a bad batch. All I know is that it has caused me some problems
BTW. Saltmix was mixed to 35ppt with a refractometer that was calibrated with pinpoint calibration fluid
I am not real sure what I am going to do here. I think that I may have to resort to weekly, small water changes, so that I don't impact the Alk in my tank to much.
I have 3 new buckets of Coralife coming in any day now. I will do a check on each one, and see if maybe this is a fluke
Later,
Nathan