I think I need to add calcium. My shrimp have slowly been losing color over time, and my ramshorns aren't as prolific as they should be.
I tried adding an eggshell- they ate the protein off of it and then left it alone. Dunno if it's contributing any calcium to the aquarium...
I give the snails broccoli, which I hear is high in calcium. But I get the impression this isn't enough.
Do I need to get the calcium into the ramshorns and shrimp? (Through food) or do I need to add the calcium to the water column? Or both?
I guess the question is, what do I need to buy to solve this problem? Some sort of liquid fertilizer? Cuttlebone? DIY?