right now my war coral has a small wound on it from damage and the skeleton showed long enough for some algae to take hold, the rest is coral flesh and 100% preventative of algae but when the skeleton showed that was enough anchor point. through chemistry the algae attached prevents new tissue from sealing the hole, that dropper can place 1 drop of 35% strategically in place. leave on 30 seconds, rinse off, repeat weekly the coral wound will close because that target burn takes out the plant allelopathy
side note
must not own 35% peroxide around kiddos its not even worth the risk. when my child was little and I used some, I dumped the rest out after use and threw out the bottle. that cost me eighty bucks in 35% let the record reflect. 35% peroxide can't be present even for accidents, it can't be in a kid home yep. that they sell it OTC at healthfood shops I find to be shocking. its danger level can't be understated.