Uploaded March 2023 | Updated September 2026, 1 hour ago

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#shorts A 300x view of brown / red Lava Rock
filterpro.co.uk
Lava rock is often claimed to be a great filter media for aquariums and while it can support a decent amount of aerobic bacteria the internal structure is mostly sealed so it has limited use for anaerobic bacteria and will be very unlikely to allow for a full cycle (reduction of nitrate) as a consequence.
However, it is very cheap and makes a great DIY filter media.
The eyes don't lie and when you get a zoomed in view you can make your own decisions......why do no other channels show INSIDE filter media they (are often paid to) promote?
Because "trust the science".
Nope, trust what you see.
Full video here: youtu.be/QTtAUYR67Eg