No actually I was just adding bc I thought I was suppose to for corals... I will buy an iodide kit tomorrow ... Are you saying iodine or iodide is harmful if given to much...
That's exactly what I'm saying. My tank is starting to run out of room to put new corals, and I have
never dosed iodide. I don't dose trace elements, either. I only dose Alkalinity, Calcium, and when needed, Magnesium. All other elements get replaced when I do a water change. Yes, corals need Iodide, Strontium, Manganese, Iron, etc., but most decent salt mixes provide trace elements in proper proportions. Adding supplements without testing is a recipe for disaster, and it's better to have too little of these elements, than to have too much. Low levels of certain elements can slow coral growth, but overdosing certain elements can be deadly. You should never add anything to your tank unless you know for sure that your tank needs it.