Betta_dude

I know ghost shrimp need iodine but do they need calcium? what are some good sources of iodine?

Chief_waterchanger

Yes they need calcium and iodine.

Dark leafy greens are good for both. Spinach, Kale, Collard greens, Turnip greens, swiss chard, etc.

sirdarksol

Nori is a great source of iodine, not of calcium, though. Of course, I don't need to worry about calcium, as my water has tons of it. One of the few advantages of having super-hard water.