are these rocks ok for my tank?

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m8r8j

Candiru
MFK Member
Sep 6, 2008
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Ipswich, MA
so i have a spot under my deck where i dump all my old substrates, and i found these close to it. i THINK they could have been out of one of my old tanks from years ago... do they look aquarium safe?ImageUploadedByMonsterAquariaNetwork1374447250.412441.jpg


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so i have a spot under my deck where i dump all my old substrates, and i found these close to it. i THINK they could have been out of one of my old tanks from years ago... do they look aquarium safe?View attachment 933608


Sent from my iPhone using MonsterAquariaNetwork app

Put some vinegar on them and if it starts fizzing then it'll effect your ph and isn't a good idea.

Also clean them with a brush and some hot water to be sure you get all the junk off them.
 
Put some vinegar on them and if it starts fizzing then it'll effect your ph and isn't a good idea.

Also clean them with a brush and some hot water to be sure you get all the junk off them.

This - this is what I do when I find rocks or buy rocks that I want to put into my tanks, -knock on wood- it hasn't failed me yet..
 
Those rocks look REALLY nice. I like them. I hope to use rocks like that in my big tank once its up and running.

Moved to setup and filtration.
 
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