Description

This is a set of 450g volcanic rocks for water tank. Can be used as filter material for drinking water and feeding water, can store out of trace elements, oxygen, water balance. . It is able to absorb harmful waste to keep the water tank in stable condition

Features

- Color: As shown.
- Material: Volcanic rocks.
- Size: About 6x6x6cm.
- is suitable for all marine and fresh water aquariums.
- It can be used as filtering media or fish tank decoration.
- Breathable water permeability is good, help to cultivate and produce.
- It is able to absorb waste to keep the water tank in stable condition.

- The surface covered with many pores.
lava rock

1 x Bag of Volcanic rocks

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