Mebbid
Aquarium Advice Addict
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Is this what you are referring to as lava rock? I had then sitting in a 5g bucket out in the shed. I had forgotten about them lol. They were "live rock" for my sw tank roughly 5yrs ago. They have been stored away for at least 3yrs now so they are surely "dead rock" now haha. But back to the question would these work as the lava rock for my fw planted setup?
They will work just fine in a fresh water tank
Also forgot to add I bought this with the plant the other day
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Is this the same as the other stuff being discussed and water down to make safe?
Yep, its the same stuff, it just comes already watered down.