Been using H2Ocean for the past 4 months.
Very good salt as per reaction from my stocks (mainly SPS, Zoas, rics).
Mixed very well with little or no residue at 1.025. Water clear in less than 5 mins after mixing.
PH is stable at 8.3 +/- 0.05.
Sorry, never measure other parameter. Don't have the habit as I'm lazy. I always use visual monitoring only.
P.S. I had heard some reefers had some bad experience too.
If your mix had issue, just take it back and I don't think there is any issue having it replace.