Treatment water contained a natural, 100- or 1000-fold increased sediment concentration in the experimental vessels (340 ml glass beakers) of the corals C. huinayensis, to which they were exposed during the periods between water changes (2-3 d). Using a turbidimeter (2100Qis, Hach Lange GmbH, Düsseldorf, Germany), the turbidity of the treatment water was measured every day and twice a day when a water change took place (just before and after the water change). The mean values from the bulk samples (ten vessels per concentration; bulk sample of water from five vessels of one concentration = one sample; per concentration = two samples) were calculated and are shown in the table, as well as the standard deviation.

This dataset was generated within the framework of the co-operation between the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (programme: 'Changing Earth – Sustaining our Future', Topic 4.2), the Huinay Scientific Field Station, European Union's Horizon 2020 iAtlantic project (Grant Agreement No. 818123) and the Centre for Marine Environmental Sciences of the University of Bremen.