I did this 3 days ago on three pieces with zoas / polyps. I also did some smaller pieces of live rock that was branch like cause I was losing the battle on those 3 rocks due to their shapes being too difficult to trim.
From my exerience here (and I actually knew this going in), it will kill pretty much all on the rocks. I was amazed how many amphipods, bristle worms, and asterina stars were on / within the rocks, it killed them all. It also killed all coraline algae, but I didnt mind as I know my tank will regrow the coraline algae quickly.
I didnt have any aptasia on the rocks to begin with. I don't know what they are called but I did have some of those tiny white tubed feather duster like things on the rocks, it killed them.
1 of the rocks I did, had a small mushroom on it that I didnt notice was there until after the dip. It survived, and is open today.
The zoas / polyps are looking way better now than before I dipped.
All the hair algae either fell off when I rinsed it, or withered to a white hue and died.
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