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7.1.3. Filter Media Test
I was expecting failure, but every tropical riparian plant I've tried has flourished in lava-rock filled HOB filters - happy with both the look and the nitrate levels. : r/Aquariums
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Best Aquarium Filter Media & Guide To Filtration - coolfish.network
Black Lava Rock- Safe for fish tanks? | by Betta Fish News Medium Club | Medium
/three--lined-catfish--resting-on-lava-rock-in-aquarium-475022314-5c660f7346e0fb00015e7880.jpg "DIY Aquarium Filter Bags and Media")
DIY Aquarium Filter Bags and Media
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