Can I Use These In My Tank. ?

[-Rob-]

they have been sitting in the corner of my yard ever since we moved in, removed from someone digging over the soil i guess.

possibly feel as tho im going to get flamed for askin this lol.

heres a pic of um.

 

[emma12321]

drip some vinegar on them if they don't fizz they should be ok just make sure u give em a good scrub, some people bake em or boil em but i can see the oven exploding if i tried that with rocks so wouldn't recommend it.

Emma

 

[mattlee]

boil them a couple of times to get rid of any nasties etc, let them cool, add vinegar as stated above. if the vinegar doesnt fizz then they are ok to add to your tank

 

[VictorMeldrew]

the good old vinegar test, as above