How to increase calcium in water?

My nerite snails shells’ have little white dents on them, I searched it up and it turns out it was due to calcium deficiency. Is there any way to increase calcium level using stuff found at home? Cause my LFS is quite far away and I don’t have time to go there to buy calcium supplements recently.

 

found at home,,,, not really... cleaned up and sanitized, then dried and pulverized egg shells maybe. but that would be kinda slow still.

much more frequent water changes should add calcium from the new water that gets added though. More like replenish it. Depends on water quality, but average tap water has 7mg of calcium per 8 floz cup of it.

Spinach, broccoli, collard greens and kale and some other veggies have high calcium if you want them ingesting it also, as well as in the tank. So maybe some thick leafy green, or winter squash, added to their diet, find what they like and will eat, that has higher calcium, then cleaned and sanitized and dried eggshells powdered with a food processor for the water supplement which will trickle it as it breaks down. You dont' want the egg membrane or Salmonella or something like that in your tank, eggshells need to be cleaned of anything stuck to it, and boiled before drying and grinding to a powder, the finer you can get it the faster it can break down and add calcium to the water.

 

Cuttlebone Can also be used but may raise your ph a little bit.

 

Cuttlebone Can also be used but may raise your ph a little bit.

And the the snails will munch on it..... At least mine always did.

 

Cuttlebone a good start if it's not enough can dose api marine calcium

 

If you have a pool, calcium chloride is a good safe bet. Mix it out of the tank with agitation to let it off gas as it dissolves then pour it in, you could use an electric pump in a water change bucket or even one of the juice containers with the mixing pump handle on top to mix it and let it gas off.

There's a website called rotalabutterfly you can reference to get your proportions right. It also may have some options in the drop down to increase GH/calcium that I'm overlooking but I know calcium chloride well as I've been using it for 5 years or so.