Surface seawater parameters (temperature, light intensity, salinity and nutrients; n = 3 for each parameter) were recorded at 0.5 m under mid water level using HOBO U24-002 conductivity loggers and HOBO UA-002-64 pendant light data loggers taking one measurement per hour. Nutrients (NO3/NO2, NH4, and PO4) were analyzed from weekly taken water samples. Water samples were also taken at 0.5 m under mid water level.