Would this work as filter media? - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 06-06-2014, 02:35 AM Thread Starter
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Would this work as filter media?

I often hear of people using lava rock as filter media because it is good for storing bacteria, quite like ceramic rings. I'm guessing these are the same thing? Could I effectively load an aquaclear 50 this and have a large amount of biomedia? Thanks.

http://www.homedepot.com/p/Vigoro-0-...0897/100427379

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post #2 of 13 (permalink) Old 06-06-2014, 03:45 AM
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never heard of that.

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first planted tank 180g

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post #3 of 13 (permalink) Old 06-06-2014, 04:00 AM Thread Starter
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I have a couple of times, including on this forum. There hasn't really been a definitive statement about it, however.

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post #4 of 13 (permalink) Old 06-06-2014, 04:06 AM
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I say try it and see.

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post #5 of 13 (permalink) Old 06-06-2014, 04:52 AM Thread Starter
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Does anybody have any insight?

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post #6 of 13 (permalink) Old 06-06-2014, 05:02 AM
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I'd work, many use it here in Hawaii for filters of all sort, mostly ponds though. The black cinder is smaller and is very popular here for aquaponics beds which act as a filter as well as a grow bed for plants. Some cinder could affect water parameters a bit depending on the constitution of the cinder.
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post #7 of 13 (permalink) Old 06-06-2014, 05:12 AM Thread Starter
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I've never heard of that. Is it a rock?

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post #8 of 13 (permalink) Old 06-06-2014, 05:59 AM
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Cinder is another name for the lava rock in your link. Cinder is formed from volcanic activity, quite a lot out here. There is typically black and red available, black tends to be smaller.
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post #9 of 13 (permalink) Old 06-06-2014, 05:08 PM
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I'm sure with its porous nature and huge surface area it would work well but why not just use sponges?
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post #10 of 13 (permalink) Old 06-06-2014, 11:06 PM
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If you have a really big media chamber, like in a wet-dry, or a pond filter as Lornek8 mentioned, it would probably be fine.

For smaller media chambers, like HOB and cannister filters, it would probably be better to use finer pieces of lava rock. I've seen them in landscaping supply places and rock yards, and occasionally I'll find small bags near decorative stones and such in nurseries/home centers. Both red and black, but pebble/gravel sized. I'm currently using a bag of horticultural pumice that I found in a hydroponics supply place, that seems to work pretty well too.
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post #11 of 13 (permalink) Old 06-07-2014, 12:49 AM
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Sorry should have clarified a bit more.
The red cinder we get here is typically around 1/2" and larger sized pieces, with some smaller stuff. The black is typically under 1/2".
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post #12 of 13 (permalink) Old 06-07-2014, 03:25 PM
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i use lava rock in all my filters. caninsters and HOBs. works well for me


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post #13 of 13 (permalink) Old 06-07-2014, 08:42 PM
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I get 3/8" lava and rinse it a LOT. VERY dusty.
Add it to all the filters where there is room (especially sumps).

I have a fair amount of ceramic and other bio-media, so most tanks just have the commercial stuff.

Lava works just fine, though. The material I get is also chemically neutral.
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