Is this the right stuff?? Pool filter sand. - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 05-14-2015, 10:08 PM Thread Starter
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Is this the right stuff?? Pool filter sand.

http://www.optaminerals.com/Construc...ca-Silica.html

This is what I bought. Says its 99% silica.

Reason I am questioning it is because it has black or dark grey bits in it. Makes me think something is off. Here is what it looks like right out of the bag.

75 Gallon Low Tech w/ Green Terror Pair
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post #2 of 7 (permalink) Old 05-14-2015, 10:58 PM Thread Starter
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Anyone?

75 Gallon Low Tech w/ Green Terror Pair
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post #3 of 7 (permalink) Old 05-14-2015, 11:27 PM
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Never heard of Temisca silica sand, but if it is used for swimming pool filtration, I cannot foresee it being anything else than non-soluble, completely inert silica sand, preferably quartz-based. Check with the supplier to confirm that it is in fact completely inert, and will not leach any material of any kind.

If so, you're ok for aquarium use. The PFS I get and have used for several years is # 20 grade white quartz-based silica sand, and it does have dark (black &/or slate grey/charcoal or brownish) bits in it - which gives it a very natural look when spread out in water.
Your white example above looks larger-grained than my #20 grade, but perhaps that's just the closeness of range of the photo. Even if it is larger, that would even be better, in terms of density to prevent it from being easily disturbed into the water column, &/or unnecessarily siphoned up.
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post #4 of 7 (permalink) Old 05-14-2015, 11:53 PM Thread Starter
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TECHNICAL SPECIFICATIONS

SymbolNamePercentage
SiO2(Silicon Dioxide)99%
SulpherSulpherLess than 6 PPM
Al2O3(Aluminum Oxide)0.73%
Fe2O3(Iron Oxide)0.27%

75 Gallon Low Tech w/ Green Terror Pair
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post #5 of 7 (permalink) Old 05-14-2015, 11:55 PM Thread Starter
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Quote:
Originally Posted by philipraposo1982 View Post
TECHNICAL SPECIFICATIONS

SymbolNamePercentage
SiO2(Silicon Dioxide)99%
SulpherSulpherLess than 6 PPM
Al2O3(Aluminum Oxide)0.73%
Fe2O3(Iron Oxide)0.27%
Does pfs stain over time?

75 Gallon Low Tech w/ Green Terror Pair
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post #6 of 7 (permalink) Old 05-15-2015, 12:06 AM
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Stain ? It doesn't stain anything around it, but it may itself get stained, if that's what you mean. It can have algae collect on it's surface if the water conditions are conducive to algae development. Or it can get a bit 'dirty' looking over time, but either way, that's not difficult to deal with. Every 4 to 6 months, I siphon up the top 10%-15% of the sand layer, and replace it with new sand - presto - just like new !

Here's what it looks like most of the time:
http://s1105.photobucket.com/albums/...l/FTS-Osaka260
http://s1105.photobucket.com/albums/...uspaul/Anubias
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post #7 of 7 (permalink) Old 05-15-2015, 12:06 AM
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My PFS has those same flecks in it as well, though I think the grain size on mine is a bit more consistent though in most cases it makes no difference. Mine hasn't stained so much as mellowed in color, I assume this is due more to mulm and biofilm than anything actually happening to the sand(I've pulled some out and rinsed it and it looks like new).


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