This manuscript presents the results of culturing experiments performed using two strains of Rosalinidae (a benthic foraminiferal family). The goal of these experiments was to improve our understanding of the incorporation of sulfate in the calcite of benthic foraminifera. These experiments also allowed the opportunity to study the sulfur isotopic composition of foraminiferal shells as a consequence of different seawater sulfate concentrations. The results are indeed interesting and appropriate for publication in BG. The work has received two very in-depth reviews from two experts in the field (Dr. Richirt and Dr. Evans), who provided complementary and extensive comments on the culturing and analytical procedures, as well as the interpretations and implications of the work. I have nothing to add to the comments provided, which I believe will greatly improve the manuscript. Thus, I invite the authors to revise the manuscript according to the inputs received. The manuscript will be considered for publication after what I believe to be major revisions.

The manuscript went through a second round of reviews. Both reviewers were already familiar with the work. They were satisfied with the way the authors addressed their comments but had additional suggestions on how to further improve the work. In my opinion, this second round of reviews resulted in a series of comments worth considering. Thus, I invite the authors to do just that and to resubmit a new version of their work after what I would consider to be moderate revisions.

The authors addressed the last suggestions provided in a satisfactory manner. The manuscript is now ready for publication in BG. I only have two technical corrections, as specified below:
Line 145: please briefly mention the criteria used distinguish living individuals while counting, if different from the specimens being attached to the substrate.
Suppl. File: please add a caption to every figure and table included.