Talking with Leonardo den Breejen about coral keeping has been truly a blessing for me. He is growing acropora corals, like the rest of us grow algae. He has been kind enough to grace me with his wisdom, and one tip is to add a drop of iodine every day. Despite dosing trace elements with Tropic Marin All-For-Reef an extra drop of iodine might just be what certain corals need. So every evening after feeding, I dose a single drop of Tropic Marin Iod into the tank, to make sure the corals have plenty. -Samuel Christensen