Seachem Fluorite Suitable?

[ellena]

Hi guys, I've been away from these forums for ages-moving house and renovating etc. In the new year though I should be ready to set up my new tank-yay!
I started it before we moved, so I have tank, filter, heater, sand and bogwood.
I bought seachem fluorite and I'm sure I posted to ask about whether it would be suitable for cories, but I don't seem to be able to look through my own posts from my profile any more?
Anyway, it's very fine, but the grains are larger than sand and angular. Has anyone used it with cories?

 

[ellena]

Finally, I'm ready to get this tank set up. When the forums changed, did all posts before that get lost? I can only see so far back.
So, the Q with seachem fluorite and cories, will it do them any harm if I try it and it is too angular? Will they stop picking it up and flirting it out if it's hurting?
Thanks for any advice, can't wait to get going with this!