What kind of rock is that? Looks coolThis reef rubble with small Aptasia was soaked in 12% hydrogen peroxide for three hours with all green algae bleached cleaned but Aptasia survived.
NOTE: The slime coat of Aptasia protects them from oxidation by peroxide that requires a toothbrush or injection needle for spot eradication. It is for that reason I use a 10 minute dip in a 10% solution of 3% hydrogen peroxide as sanitation protocol when bringing in suspect coral frags. For my purposes, diver collected live rock is spot treated only after inspection with manual removal as preferred first phase of sanitation.