Black Diamond Blasting Sand for an aquarium? - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 20 Old 01-31-2014, 09:55 AM Thread Starter
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It is about $8-10 a bag for 50lbs bag. I believe. I wont be using it though.


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post #12 of 20 Old 01-31-2014, 10:04 AM
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i ended up looking for glass bead sandblasting media, ... here, it's about $40 for a 50lb bag i think.

not cheap compared to any other substrate i've heard of

but sand sized glass beads, perfectly round, non-toxic, on it goes, ... safe in all regards, ... just really expensive compared with other substrates people use
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post #13 of 20 Old 01-31-2014, 10:10 AM Thread Starter
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I was just going to get the aquarium sand from a pet store. Since after looking into the black diamond sand it may be too sharp for gold fish since they sift in the sand a lot. But it would be fine for other fish that are not bottom dweller or one that sifts in the sand.


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post #14 of 20 Old 01-31-2014, 10:41 AM
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for sand, once i really started looking at things on the scale of it's individual grains, it opened up a whole world of things to consider

shape being a key one for sand blasting and foundry sand this comes a big issue, ... between angular (sharp edges) all the way to round (no sharp angles at all), and often 2 grades inbetween sub-angular & sub-round.

anything that fit "angular" or even "sub-angular" i will stay away from.

pool filter sand fits angular & high in silica, although i don't think it's anything like slag (your black diamond sand)
playsand, ... actually i dono about play sand

slag of any sort i tend to stay away from.

foundry sands are much nicer, they want round so it doesn't attach itself to the metal casting.

but i don't think any of these are on the list of "affordable" except compared to costs at the LFS, then they're more than affordable to go that extra distance.

otherwise, while i don't know much about playsand, it sounds like the best bet
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post #15 of 20 Old 01-31-2014, 10:47 AM
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i have never encountered an angular pool filter sand the stuff i have looked at was pretty rounded and soft to the touch.play sand is silica sand,also fairly soft.i have play sand in with orandas.works just fine.

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post #16 of 20 Old 01-31-2014, 11:02 AM
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maybe i should consider beach sand, wash, clean, etc

from really zoomed in pictures i've seen of pool filter sand it's like small cube crystals
yes, at the actual size, those angular edges don't mean anything, but i'm being overly cautious
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post #17 of 20 Old 01-31-2014, 11:10 AM
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pool filter is the same as play sand as far as it being silicate based.it is select color/size silica sand.

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post #18 of 20 Old 01-31-2014, 11:28 AM
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damn, ...

yes i know others have reported never having any problems with it.

more personal judgements & stubbornness, ... i don't like silica if i can get away with it.
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post #19 of 20 Old 01-31-2014, 11:53 AM
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if you do not want silica sand, sandtastik sand is silica free,as is crayola play sand.both are non-toxic aquarium safe.just make sure any silica free sand that you try is not pulverized marble sand.

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post #20 of 20 Old 01-31-2014, 09:15 PM
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This is really a non issue. 20/40 size has been proven too many times to be perfectly fish safe FOR EVERY FISH. Including bottom dwellers like Corys. Including sifters like Kribs. FOR EVERY FISH.

Yes, some people claim otherwise. They also claim to have been impregnated by aliens, with about the same level of authenticity.

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