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In a message dated 98-05-30 15:53:41 EDT, Aquatic-Plants-Owner at actwin_com
Roger Miller writes:
<< Flint is another form of silica (color due to stable impurities), so you
shouldn't have any chemical problems switching to silica sand. Silica
sand is very light-colored. If you don't like the lighter color then you
might consider mixing it with a darker sand or just using an entirely
different product. >>
Thanks for the info Roger. I initially used to get the red flint from an
aquarium wholesaler at .35 per pound than wondered into a pool supply
shop and found the stuff for .10 per pound. It was exactly the same bag
from the manufacturer. I used to mix the red flint with what the aquarium
wholesaler called black beauty which was a fine blask potash byproduct
to darken the color.Today the silica sand is selling for $9.00 per 40 lb bag
wich comes to .225 per pound which is reasonable considering inflation.
Since there are no local sources of red flint and black beauty I think I''ll
switch to the silica gravel. Hopefully a 50% mix with my old gravel will
darlen the color enough so it is acceptable to my decorating tastes.
If anyone has suggestin on darker colored gravels I'm all ears.