I've dipped a piece of LR in h2o2 solution 3% fully submerged until it bubbled ~ a couple minutes and placed back in sump and the bubble broke down and disappeared. Had a couple zoas on that rock but they were and are still fine. No bubbles on that piece now. I've even injected with areas of cyano on my sand bed and the patch would bubble and disappear overnight. It will kill your Copepods/amphipods - they start fizzing and bubbling.
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