coir fiber??? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 12-16-2006, 06:08 PM Thread Starter
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coir fiber???

i got some from these bulb flower pots will these work as the bottom layer and the top layer sand
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post #2 of 6 (permalink) Old 12-16-2006, 06:36 PM
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there is really no point. if you want to keep sand from compacting simply put any larger grain gravel under the sand. as for coconut fiber, it will completely disintegrate withing 4-6 months and the sand will compact anyway, not to mention the little coconut sticks protruding up from your sand should you disturb it too often.


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post #3 of 6 (permalink) Old 12-16-2006, 07:15 PM Thread Starter
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o ok i thought it wud be better for the plants i got sand that the petstore uses it big grain sizw sand
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post #4 of 6 (permalink) Old 12-16-2006, 07:24 PM
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"sand" as defined as grain size under 1mm
2-5mm grain size may be optimal for plants,
as it avoids compaction and allows for better
fertilizer, water, gas circulation at the roots.
2mm is the thickness of an American Nickel.
please look through many substrate threads
as we debate this issue here ad nauseum.


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post #5 of 6 (permalink) Old 12-17-2006, 03:51 AM
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Quote:
if you want to keep sand from compacting simply put any larger grain gravel under the sand.
...and watch as the larger grained gravel you simply out under the sand to prevent the sand from compacting becomes the gravel on top of the sand you didn't want to compact. Smaller particles always manage to work their way under larger particles.

Spypet's second suggestion about using a larger grained sand to prevent compaction is probably a better one.


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post #6 of 6 (permalink) Old 12-19-2006, 12:49 PM
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I think both Spypet and Momotaro are slightly overstating.

If you try putting a layer of sand on top a layer of gravel, left undisturbed, the sand will work itself into the spaces between the gravel particles, but will not raise the gravel to the top layer.

If you try putting a mix of sand and gravel, undisturbed, the sand will work its way slowly downwards to fill gaps between gravel, this will leave the gravel portion of the mix without sand on the top.

If you have a choice, you have a problem, till you elect your choice. No choice, no problem, only consequences, learn to live with them.
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