After the initial measurements, the valves on the respirometer were opened, and the flasks removed and filled with 20‰ seawater, which was the approximate salinity used to moisten the sand in the maintenance tanks.
After the initial measurements, the valveson the respirometer were opened, and the flasks removed and filledwith 20‰ seawater, which was the approximate salinity used tomoisten the sand in the maintenance tanks.