Pisces Smooth Lava 7kg Rock Box Set New Zealand Smooth Lava is unlike any other on the planet. It's unique colours and texture have not been discovered in any other volcanic location worldwide. The rich red colours of the molten magma form not only an exceptional scene for any aquarium, but act as a biological filter bringing balance and promoting positive bacteria growth which helps maintain crystal clear waters. Pisces hand picked authentic range of natural aquascaping rock is exclusive in Australia. Great care has been taken by master designers to deliver you the perfect natural scenic rock for use in Iwagumi and Amano style aquariums, biotope aquariums, terrariums, bonsai & traditional Japanese style rock gardens. Each 7kg box will contain approx 5 rocks and the rest will be nano sized pieces. As these are naturally occurring rock pieces, variations in size, colour & texture are expected.