Beefcake July 31, 2022 Share July 31, 2022 Found some lava rock while digging through some stuff I had laying around when getting ready to set up my 180. Would it be safe to use? I've seen somewhat mixed answers online. Link to comment Share on other sites More sharing options...
Origami July 31, 2022 Share July 31, 2022 I'd be cautious using it. If it's synthetic lava rock (made for commercial purposes), it may have additives that may leach and be toxic to your tank. However, a lot of natural lava rock is safe. However, you may have difficulty keeping it submerged because of trapped air in the rock. Link to comment Share on other sites More sharing options...
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