[jtravapd]

hello everyone, im just curious what people add to their to tank if anything to help with growth and health of their corals ect. which products do you use, how often, is there a chance of overdosing?...the only things i add to my tank other then fish food is a cube of rotifers a day, and twice a week i add live phytoplankton...i see ads everywhere and in readings that adding iodine helps , but nowhere can i find out how much to add. i have a iodine test kit, and it seems way to hard just ot test to see what your idoine levels are never mind adding some more to the tank..

are there certain vitamins or something you can add ot the water that has a small chance of overdosing?..