These lava rocks are a natural product, their porous structure provides a large surface area for nitrifying bacteria to colonize, helping to eradicate toxic ammonia and nitrites.
They are ideal for attaching aquatic moss and/or plants to
Colours vary from black through to red in colour
Sold in sets of 6 small, 12 mini or 1 large Red or Black
Sizes very approximately mini (1-3cm), small (3-8cm), large (10-15cm)
Click on Product Options to choose size/quantity