Bioscape Cloud Terrarium Tall Large + Glass Cover 30x30x45cm Filter Accessories allows the UV light to

allows the UV light to penetrate the pond water as it flows through the casing

which requires an external device to change the spectrum

Sand granulation is 1-2 mm

BPA free (independently tested by SGS)

Aqua One test kits make it easy to balance a range of organic compounds helping to maintain a healthy aquarium

Bioscape Cloud Terrarium Tall Large + Glass Cover 30x30x45cm Filter Accessories allows the UV light toBioscape Cloud Terrarium Tall Large + Glass Cover 30x30x45cm Bioscape Cloud Terrarium's are "ultra clear" glass terrarium's which sit on a unique, raised glass base that appears as if it's "floating in the clouds". These Cloud Terrariums can be used to create both an aquatic or terrestrial creation. *Not to be filled completely with water*