Join Date: Nov 2018
Location: Oil City PA. USA
Yep, cuttlefish bone is another good source. However the snails will crawl over it along with the egg shells, but I don't know if they feed on it, or that it just dissipates into the water, and they get the calcium that way.
I don't have to add calcium to my water in any of my tanks since moving into North Western PA. the water here is very hard, so there is no need to make it harder. And yes you will spend hours watching their antics. They do put on quite a show.
I have heavily planted tanks and some of my plants have very delicate leaves, or very thin stems. It amazes me how that big snail will climb to the top of a delicate plant and never bend it or break it. And then when they move on they just drop off and free fall to the next plant lower.