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Old 09-02-2008, 09:02 PM
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How deep is your sand anything less than three inches is useless especially if it is larger grains.

Useless in what context?
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Old 09-02-2008, 11:01 PM
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Useless in what context?
For NO3 reduction you need a min of 3" anything less will just turn into a nutrient sink.
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Old 09-03-2008, 12:53 AM
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I'll start a different thread on depth later on
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Old 09-03-2008, 02:15 AM
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I take it you don't agree.
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Old 09-03-2008, 02:19 AM
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I take it you don't agree.
Well, yes and no. Kinda. The thing is, I don't think you need sand at all, and if you use it, is 2 inches bad where 4 inches is good? If so, why? If not, why not? Don't worry, we'll get our own thread going
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Old 09-03-2008, 02:52 AM
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is it loose clumping or hard clumping? loose clumping is usually from sticky biofilms from excess dissolved organics,hard clumps is usually calcium carbonate binding
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Old 09-03-2008, 03:07 AM
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is it loose clumping or hard clumping? loose clumping is usually from sticky biofilms from excess dissolved organics,hard clumps is usually calcium carbonate binding
Another good way to tell why its clumping is to put the clump into some bleach water, if it falls apart its excessive organics if vinegar is the only thing that breaks it apart its calcium
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