PFS and rock? - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 04-13-2011, 07:30 PM Thread Starter
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PFS and rock?

I'm setting up the layout for my tank and I am using 3" of pool filter sand. I want to add a few pieces of large rocks on top but do you guys think that might cause a problem down the road by compacting the sand to much under these rocks?
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post #2 of 3 (permalink) Old 04-14-2011, 05:15 AM
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It is suggested that you put your rocks in first and then add the sand so that the rocks are more stable in the tank.
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post #3 of 3 (permalink) Old 04-15-2011, 01:12 AM
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Yes, it is not the compression, but the poor water movement under those rocks. Do as comet suggests. Just barely enough sand to keep the rocks stable, the rocks on the bottom, then fill in around with sand.
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