Cleaning lava rock
Quick update, after another few days of soaking in fresh RO, ph stabilized around 7.5 and tds was at 62 ppm. Gh is 5-6 and kh is 4-5. I went ahead and put them in white distilled vinegar today to soak for a while. We値l see how it goes!
Update: I soaked them in vinegar for 3 days and the stuff I could get a brush on came off easily. Still seeing some funk down in deeper holes but the rock is much cleaner looking with most of the deposits gone. I rinsed them a few times and soaked in RO overnight. So far, TDS has not risen in the bucket. I値l test all parameters after a few days but I think I might be in the clear!
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Last edited by powhound84; 09-12-2019 at 03:24 PM.