old rocks for my FW tank?

[mtnhomedude]

On the back of my land there are the remains of am old rock chimney!! I got some real nice flat ones with the idea of doing hiddy holes for my fw tank!! I did the vinagar test and there was no fizzies!! Now my question is Besides washing them real good, how can I "cure" em??
bake em?
soak em?
:help:

 

[Hooked Newbie]

Don't bake or boil them!

You can soak them in a tub for a couple weeks and test the water parameters. Truthfully a good wash should be enough.

Some may say this is cruel, but... you can also add a few pond snails to check for heavy metals. If they die, you got em and shouldn't add any permanently desired inverts.

 

[coach_z]

Don't bake or boil them!

i am curious why you shouldnt do that

 

[mtnhomedude]

any geologists in da house??

also a gratuitous shot of Moby my Violet Goby!!

 

[Hooked Newbie]

i am curious why you shouldnt do that

Explosion possibility from trapped / released pockets of gas. :eek3:

OP- I'm no geologist, but I think it may be shale.

 

[bushwhacker]

not really gas trapped but water... as its heated yeah it can turn to steam and explode the rock

 

[mtnhomedude]

not really gas trapped but water... as its heated yeah it can turn to steam and explode the rock

Even though these where from an old chimney??

 

[Hooked Newbie]

i am curious why you shouldnt do that

not really gas trapped but water... as its heated yeah it can turn to steam and explode the rock

Trapped moisture can cause it as well, but trapped gasses are just as likely. Think mine explosion on a smaller scale.