I have now received three reviews of the revised paper, two of which suggest that it needs considerable work before it can be published. In the circumstances, I ask the authors to consider carefully the comments of the reviewers and then submit a revised manuscript, as the information is certainly of considerable importance to researchers wanting to use similar tracers to investigate water movement and mixing rates. At this stage I am not sure if the work required counts as a major or minor revision, and the paper may need to be sent out again for review.

Both reviewers agree that the resubmitted manuscript is considerably improved, but they also raise a number of questions that need answering before the manuscript can be accepted. The authors are certainly making important points about the potential use of additional tracers for ocean mixing, but the paper still contains a number of statements that need amplification and/or clarification. Additionally, it needs the second author to take a look at some of the English. It's getting there, but still needs some more work.

See attached file