What kind of rock is this? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 10-13-2012, 03:42 AM Thread Starter
Algae Grower
Join Date: Sep 2012
Location: Columbus, Ohio
Posts: 65
What kind of rock is this?

Ive had this rock in my aquarium before I knew there were certain rocks such as limestone that mess up a tanks Ph. Im really not concerned about its effects on my tank since its been in there for 2 yrs with no trouble, but its my favorite stone and would like to get a couple smaller ones like it. I went back to where I collected it, local creek but had no luck finding anything like it. I figured if I knew what it was I could buy some online. Any ideas?
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post #2 of 3 (permalink) Old 10-14-2012, 03:10 AM
Algae Grower
Join Date: Jul 2012
Location: USA
Posts: 25
Is it heavy and which area was it found in? Wondering if those pits are from minerals that have eroded or if they are from gas bubbles (vesicles). Do have any photos from other angles?
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post #3 of 3 (permalink) Old 10-14-2012, 03:58 AM
Planted Member
Join Date: Jul 2012
Location: Southwestern Connecticut, USA
Posts: 152
Just going on an eyeball estimation here, but it looks like a feldspar / quartz river cobble. (river cobbles are stones worn down to smooth, round forms, usually by having spent time in a riverbed - though a glacier would have a similar effect.) Stones like that are common around here, and I've got some in my tank.

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