Volcanic rock can it be used as bio media? - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 03-11-2008, 03:05 AM Thread Starter
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Volcanic rock can it be used as bio media?

Hi there,

can volcanic rock be used as bio media? I have loads of it and want to know if its safe to use, it would have a huge surface area and want to know if its a viable option?

Regards Darren
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post #2 of 9 (permalink) Old 03-11-2008, 03:06 AM
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It is very much safe to use. The only downside I know of is that it tends to clog .
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post #3 of 9 (permalink) Old 03-11-2008, 03:07 AM
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post #4 of 9 (permalink) Old 03-11-2008, 03:57 AM
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Lava rocks will make a decent bio media. It's very cheap and easy to find. The big downfall with it is that it's very sharp, heavy, and almost impossible to clean. It also has a lot less surface area than bio balls, so only use it if you have no other backups and will not spend a few more dollars for bio balls. Overall, lava rocks is better off used for gas grill

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post #5 of 9 (permalink) Old 03-11-2008, 04:29 AM Thread Starter
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thanks, the cost wasnt the worry was just something I had, what diametre are bio balls?
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post #6 of 9 (permalink) Old 03-11-2008, 01:14 PM
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Lava rock is pretty good but does clog and then is no better than any other rock
Plastic pot scrubbies are hard to beat for surface area and easy to rinse. Very Cheap. 6 for $1 at the Dollar store.

Regards,
Sam
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post #7 of 9 (permalink) Old 03-11-2008, 01:27 PM
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Originally Posted by duzzy View Post
thanks, the cost wasnt the worry was just something I had, what diametre are bio balls?
1-1.5"


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post #8 of 9 (permalink) Old 03-12-2008, 05:51 AM Thread Starter
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thanks
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post #9 of 9 (permalink) Old 03-12-2008, 11:14 AM
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I have used lava rock in different pond applications over the years. I am currently using 16 cubic feet of it in a 4 tray shower flowing 9,000 gph over it. It will work very well in a shower or TT application but will eventually clog in an under water application. If you can get feather rock, this is better. Lighter and more porous.
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