Adding Iodine for Invertebrates

[George]

LOL, iodine test kit. Generally I agree that you should test before you dose anything. But from what I have heard, hobby iodine test kits are all garbage. At the mean time, we just have to trust what the good doctor said.
To OP, probably feed them a variety of foods to ensure they have all their nutrients necessary for a good molt. Also keeping different kinds of shrimp in the same tank might not be a good idea. They may try to get to each others. Shrimps are most vulnerable during molting. Good luck!