The marine reef aquarist carries out routine changes to maintain the necessary high quality of the seawater. The life within the aquarium makes demands on the seawater and the aquarist needs to ensure that there is sufficient quantity to meet those demands.
Some of the additions to the seawater are well known and accepted. One of these is calcium. Others are not so widely accepted as necessary, and one of these is iodine.
All non-scientific people, which includes me, tend to think of iodine as, well, iodine. As in so many things, it is not as simple as that.Read more →