First SW Tank

[makana]

Thats interesting. It was labeled as tufa at the lfs.

Although from what I have read there is tufa and tuffa and they are different. Some people have bought some that is mined in Ohio, some of it is supposedly old dead coral reef. I really don't know how to tell what I have. It looks like fossils in rock, it is fairly porous, and fairly fragile.

Although the pores are quite a bit smaller than the piece of live rock I have. The pores it has are large enough that snails seem to be able to live inside it. Last night I spotted two snails on the rock and this morning there was a tiny one, all the same type, not sure what type.