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Re: [APD] sand
I wrote an article for a local newsletter on how to do this, it is available on Aquarticles.com. The substrate I got from this is now more than a decade and going strong. When the gravel looks too dark, I siphon the top most layer and put it out in the sun for a few days. Then I sprinkle it back on. This brightens up the tank.
At 17-09-2011, you wrote:
> Beach sand definitely contains broken shells and will raise pH. You could dissolve the shells out with Muriatic Acid outdoors if you really wanted to. Use ventilation!!!!
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