Beach/garden Rocks ?

[khial]

Hi all,

I know this has probably been covered a million times before but...

I have some rocks i found on the beach several years ago and have been in my garden since, so have been rained on/watered with the plants,

will it be safe to put these in my tank? I have scrubbed them with hot water, rinsed several times and soaked in boiling water out of kettle.

I just thought i would get some advice before taking the big step of putting them in!!

thanks in advance

 

[garyspence84]

As long as they don't have any "veins" on them, or different colours running through them, then they should be fine. I would leave them in a bucket of water for a couple of weeks and do a few water tests to see if they do anything out of the ordinary to the water.

Do the odd water change though so there not just sitting in stagnant water

 

[khial]

ok im just trying to research into what type of rock they are, its like a black/charcoal colour inside but a white/cream colour on the surface and sound like porcelain when knocked around....someones said slate but looking into it anyway

 

[fishytank101]

try putting something acidic like vinegar or lemon juice. If it fizzes it will raise your ph. (as another test you should do)

 

[Liam2368]

As above do the vinegar test.

 

[Mikey1]

vinegar test, then soak them in a bucket for a week or so....
 
never boil rocks, they could explode and kill you!! (not joking)

 

[fluttermoth]

Sounds like flint.

If it is, it's quite safe, although do watch out for sharp edges.

 

[khial]

Hi everyone, I did the vinegar test and all was fine, they've been in the tank 8 days now and had no problems, look lovely, still no clue on what it is though 

 

[fishytank101]

great! hope you enjoy your new aquarium rocks!