I have been using Eco Iodine Marine and Eco Strontium Marine from API but I do not see it on Dr Fosters and Smith anymore and everywhere I check I feel the prices are a lot higher. What other brands do fellow hobbyist recommend?
May I ask why you are even using them ? Most tanks are way to high in "Iodine" and excessive Iodine causes crustaceans to molt excessively killing them. Sr++ is not needed by corals, it is just a substitute ion for Ca++, as it fits real nice into the Aragonite crystal lattice. The amount of Sr++ in corals is pretty much directly proportional to that in water. That is why Sr++ is used for paleothermometry.