Lava Rock Boulders - per kg

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Large Pieces each weighing 4kgs

You can be really creative with lava rock because it stacks so well. The little groves within this rock means it almost feels like it sticks to each other making it ideal for creating caves or other types of areas in which fish or shrimp like to hide.

If you plant some greenery around the back and front of them, it will really bring out the colour too.

In terms of sizes, most pieces weigh 3kg (some less) but we have the odd larger size. The image shown is of 3kgs and this gives you an idea of what you would get in terms of qty. So if you wanted 3kgs add 3 to the qty box.

If you have a particular size, shape or style in mind, feel free to leave notes in the comments section when checking out and the picking team will try to match it as closely as possible.

by Trevor Thorpe on 25/5/2015

Received one large rock when I wanted a few smaller ones. The rock I received would no doubt look good in a larger tank but too big for mine.

by John Holt on 11/5/2015

great friendly service - good product will use again - thankyou

by Katherine Porritt on 23/9/2014

Disappointed. Received the all the items I ordered in a timely manner and very well packed. I ordered 6 kg of lava rock and expected to receive multiple small pieces - something like the picture. However I received 2 very large pieces and 2 smaller pieces. I have tried but cannot break down the large pieces so I cannot create an aquascape with them. I would suggest that if you want multiple pieces like in the picture that you specifically ask for this.

by Charlotte Inchley on 13/6/2014

perfect! Even got some longer pieces as I had asked for when ordering, colour is lovely with black/dark substrate and super easy to attach moss/anubias to.

by Richard Pelling on 21/4/2014

good packaging and looks good in tank

by Andrew Duncan on 1/7/2013

This rock is fantastic. There are a range of colours from black, red and grey and they compliment each other really well. It is very light and works very well for aqua-scaping.

Ask a question about this product
Is this rock neutral?

Yes it is

Would it be possible to ship out black Lava pieces only, I would need 3 - 4 largish bits, as well as several smaller parts it would be for a 5ft african cichlid aquarium.


Sadly not - it's a dark red colour

Do you have any darker colours/black rock in at the moment? What are the dimensions of a 1kg piece? Thanks :)


No darker pieces. Impossible to say what size 1kg is.

if i place a order for lava rock can i order small pieces

can i order small pieces


What size is small?

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