This uniformly graded oolitic aragonite not only provides nitrate reduction in shallower beds but also has an increase in pore water space which allows maximum diffusion rates of minerals and trace read more ››
This is the larger particle size version of ESV's Ultra-White Fine Grade Substrate for aquariums with very high water velocity, or for hobbyists who simply prefer larger particle sizes. 8.25 pounds read more ››
ESV Ultra--White Substrate provides the whitest calcium carbonate based sand available to the marine aquarist. This translates to greater efficiency of lighting systems by providing increased levels read more ››
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