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Old 04-18-2005, 10:07 PM   #1
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sand questions

I went to Home Depot today to get sand for my up and coming tank. I read here to get the play sand, so I bought two 50 lb bags. It didn't say what "kind" of sand it was silica, etc. What if it is silica? What is so bad about this stuff?
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Old 04-18-2005, 10:42 PM   #2
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Silica offers no buffering properties like aragonite base sand does.
Aragonite based offers calcium and does a great job pH buffering.
also silica is basically tiny shards of glass, aragonite is round pebbles. for fish like gobies that spend their time sifting sand through their gills its ideal to use aragonite based.

to test if it is silica or aragonite based put some sand in a cup and pour a little vinager over it. if it fizzes( ) you got what you want. if it doesnt you have silica based.
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Old 04-18-2005, 10:53 PM   #3
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it didn't bubble
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Old 04-18-2005, 11:09 PM   #4
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Is that the same silica that causes algae or it that silicate or are they both the same thing?
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Old 04-18-2005, 11:24 PM   #5
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I don't know about that one Kat.
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Old 04-18-2005, 11:53 PM   #6
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http://www.aquaticcritter.com/Saltwa...eraquarium.htm
Here's an article that has something about silica sand and it's problems.
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Old 04-19-2005, 12:25 AM   #7
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Although it is recommended to use aragonite sand in marine aquariums, the silica play sand is often used when aragonite is not available. Many have used it and shown no significant differences, and some have not been so lucky. This does not mean that it cannot be used. I used sand from home depot which was silica (glass) sand and it treated me well.
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Old 04-19-2005, 10:28 AM   #8
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The silica sand and silicates in the water column that cause diatoms and other brown algaes are not the same.
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Old 04-19-2005, 02:11 PM   #9
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Well after all the reading I'm going with the silica sand. Thanks for all the replies.
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Old 04-19-2005, 10:54 PM   #10
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Quote:
Originally Posted by electrikat
Is that the same silica that causes algae or it that silicate or are they both the same thing?
They are not the same thing. Silicates are what fuel algae growth. Silica unto itself does nothing.

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