Read what I found:
http://www.madsci.org/posts/archives/2001-12/1007434629.Bt.r.html
Can egg shells be used as a source of calcium for the aquarium? Both for plants and inverts? Would it be safe for SW?
I remember my dad used to put crushed eggshells around his plants as a kind fertilizer, just as this document says.
Also, as a source of calcium I don't know if it can be used as we use crushed coral to raise KH.
Just wondering.
http://www.madsci.org/posts/archives/2001-12/1007434629.Bt.r.html
Can egg shells be used as a source of calcium for the aquarium? Both for plants and inverts? Would it be safe for SW?
I remember my dad used to put crushed eggshells around his plants as a kind fertilizer, just as this document says.
Also, as a source of calcium I don't know if it can be used as we use crushed coral to raise KH.
Just wondering.