| Q:
Hi, I was just curious what the difference is between the
Onyx Sand and Gravel... is it just the size?
A: They are the exact same ore with
the exact same mineral composition, the only difference
is the size.
Q:
I've placed onyx gravel mixed with flourite into my planted
tank. I am aware that flourite does not release iron into
the water column. Will onyx gravel release iron into the
water column?
A: Onyx Gravel or any of our freshwater substrates will
not release iron or any minerals into the water column to
any significant degree.
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