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Lava Rock as a biological filter media
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FrogSplash
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Joined: 24 Sep 2010
Location: Trabuco Canyon, CA

PostPosted: 2011.01.31(Mon)12:06    Post subject: Lava Rock as a biological filter media Reply with quote

Before I commit to building my own super filter for my tank and future upgraded tank, I was wanting to maximize my canister filters biological filter media to account for a heavier fish load until the new tank comes in. I was thinking of adding lava rock as a less expensive alternative to ceramic rings and or bio balls.

has anyone used lava rocks before? any pros and cons? Thank you
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diademhill
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Joined: 18 Apr 2007

PostPosted: 2011.01.31(Mon)12:14    Post subject: Reply with quote

Grog can be a good filter medium but you need more space than for a similarly effective batch of noodles.

I've used it in sumps but you must use a prefilter/debris trap which can be vetbed or sponge and you need to be careful you don't get too much flow leading to bypassing of the rocks.

It is the stuff that Reef One tout as their wonder filter media for Bi orbs.
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