Lava Rock Substrate? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 03-12-2010, 06:57 PM Thread Starter
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Lava Rock Substrate?

I was at a nursery recently, and saw they had bulk lava rock on sale for $8 for a big bag. I'm going to be using topsoil/clay, and needed something to cover it up. While I know that Lava rock is sharp and not always recommended, I won't be keeping any big fish. I was probably going to go with Shrimp/pair of dwarf German rams. (maybe some tetras)

The reason I want to consider lava rock is,
1. It looks like a great substrate to have a java moss carpet on,
2. It's cheap!

Now my plan is to eventually have non to very little of it showing, are there any other issues with it? And will it scratch up my tank if I use it? And how sharp is it? Are we talking about my RCS being amputees or just an issue with bigger fish.
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post #2 of 5 (permalink) Old 03-13-2010, 05:20 AM
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I was going to use it at first too. It seemed like an ideal substrate if you don't have any bottom dwelling fish which I have. How big are these rocks? I know they come in various sizes. I wonder if you have a giant rock tumbler to smooth out the lava rocks.

Rams like to hang out on the bottom and dig yes? I wouldn't have rams or lava rock.


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post #3 of 5 (permalink) Old 03-13-2010, 11:31 PM
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I have crushed lava in a few tanks with moss undergravel filters and shrimp. This stuff is great for UGFs my shrimp are verry healthy baby shrimp love the little crevises to hide from my endlers. The healthiest most colorfull shrimp I have come from theses tanks. LIke Mistergreen said I wouldnt want bottomdwellers or diggers in because of injury. Rock tumbler would be great if you could get the grains smooth like aquasoil.
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post #4 of 5 (permalink) Old 03-14-2010, 02:04 PM
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I have a 10gallon that is about to be stocked with rcs, and has a few guppies in it right now. I would like to keep the guppies, so I need more places for rcs fry to hide. Seems like this is a perfect substrate for my needs. Awesome.

I was thinking about using some of this same hardware store lava rock in a canister filter. Would this work well for bio filtration?
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post #5 of 5 (permalink) Old 03-15-2010, 08:22 PM
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yes, the rocks should do fine in the canister.. Use the bigger rocks for ease.


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