lava gravel substrate - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 08-31-2013, 10:41 PM Thread Starter
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lava gravel substrate

My lfs sold me on lava substrate for my planted tank. Its been a couple of weeks now wnd I don t feel the plants are really rooting and taking off. Has anybody planted with this substrate. Wondering if I should mix another in with it?

90 soon to be planted! Beamworks 3 watt led. Lava and sand substrate.
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post #2 of 7 (permalink) Old 09-01-2013, 02:58 PM
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What kind of plants? What kind of fertilizer are you using?

Lava rock is inert, so there's no nutrient content for plants. You have to add that yourself - via root tabs or fert dosing.
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post #3 of 7 (permalink) Old 09-02-2013, 05:09 PM
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How fine is the material? If it is almost pea sized, then I would remove it and use a good plant substrate. If it is sand-sized then it may work just fine, but definitely needs fertilizer.
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post #4 of 7 (permalink) Old 09-03-2013, 10:12 PM
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I imagine it wouldn't be much different from using any other gravel, except maybe quite a bit cheaper. I doubt it had a decent CEC, and as said above, it's inert, so you would have to add something to supply nutrients (dirt, root tabs, water column dosing, etc.).

The plant roots might like the texture of the stuff better, but I don't really have anything to support that.
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post #5 of 7 (permalink) Old 09-04-2013, 03:44 AM Thread Starter
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Im using co2 booster in the morning. Leaf zone once a week, and flourish twice a week. I will be adding co2 this weekend. The lava rock is about half the size of a pea. Im kind of pissed because I thoght it was high in iron. The beamswork light has 32 3 watt leds. I wasnt sure if that was enough light so I added a zoo med t5 I had. Im trying to grow dwarf hair grass and glosso, a few other misc for now. Would Suck to have to redo the substrate. any guidance would sure be appreciated

90 soon to be planted! Beamworks 3 watt led. Lava and sand substrate.
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post #6 of 7 (permalink) Old 09-05-2013, 03:15 AM Thread Starter
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Do you guys think I could add flourite over tbe top and let it settle in?

90 soon to be planted! Beamworks 3 watt led. Lava and sand substrate.
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post #7 of 7 (permalink) Old 09-05-2013, 08:27 PM
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Flourite is also inert. So you'd still need to use root tabs or other fertilizer.
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