Spectrastone white gravel is an ideal substrate for fresh water and marine tanks. Our standard colors use silica quartz which is an inert stone that will not affect pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A

Spectrastone cherokee pebbles is an ideal substrate for fresh water and marine tanks. Cherokee is an inert stone that will not affect pH.IngredientsN/A

stoney crushed coral is an ideal substrate for marine tanks. We use aragonite that will buffer pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A

Spectrastone jumbo gems is an ideal substrate for fresh water and marine tanks. Jumbo gems is an inert stone that will not affect pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A

Spectrastone red flint is an ideal substrate for fresh water and marine tanks. Red flint is an inert stone that will not affect pH.IngredientsN/A

Stoney River sand is an ideal substrate for fresh water and marine tanks. We use silica quartz sand that will not affect pH.IngredientsN/A