Limestone as liverock?

My parents recently picked up a piece of live rock from our LFS. it looks to me like a piece of limestone covered in coralline algae. Would it be safe to add some limestone to my tank just as a base for my live rock creations? im thinking it would be okay if it was cleaned well. it would just end up looking like a piece of LR when covered with coralline. Help me please im looking for a cheap solution to make my tank more full, and i have tons of limestone.

Thanks,
Cerpin

 

Since Limestone is mainly calcium carbonate, I would think that it would tend to erode away as it tries to balance the calcium levels in the tank. I may be wrong, if so please correct me!

Mike

 

not sure. more help please!!!!!

 

DONT USE IT! Lime stone can be very bad for fish!

 

could i ask why??? i cleaned the hell out of it.

 

http://www.reefs.org/library/talklog/c_hofman_110997.html

 

Hmmm....ok maybe the limestone im thinking of is different....ugh i remember reading somewhere about using rocks you would find around the house...and one of them was limestone and how it was bad for fish...

 

http://www.diynetwork.com/diy/lp_fish/article/0,2041,DIY_14062_2270641,00.html look at the fifth paragraph

 

i dont see why it would be a problem being derived from the old coral reefs it has the same porous structure as live rock

 

my parents havent had any trouble with the piece they got the coralline is thriving on it.