Sources of calcium!

I would like some feedback on the following.

Calcium chloride. Cutting edge..
Calcium nitrate. Botanicare..
Calcium carbonate.. gh..

Calcium chloride is for animals.

Calcium nitrate is for hydro plants

Calcium carbonate is for soil plants. When animals eat it, it becomes calcium chloride and burps. When nitrifying bacteria exist around it, it creates calcium nitrate and burps.

Thanks church..

One of my finds.