I am. 1 cup to approximately 500g system every other day.
Reason is hair algae and small cyano outbreak.
New system, filled on dec31 and rock that was cured for almost a year. Bare bottom. Very few fish so far.
120 sps frags, 8 hammers and 2 csb nems.
Results cyano gone, hair algae is dying off.
Corals get ticked shortly after each dose and remain so for a day or 2.
What you are really in for: Hand cleaning, hard work siphon and rasp-removing of accumulations and invasions outside the tank and doing massive water changes is 90% of this thread, peroxide is 10%. We almost never dose peroxide into the tank water, this is a you-work-physically-hard as catch-up...
forty pages of peroxide work, everyone’s happy, we r onto something. Every practical application answer to peroxide is in there as a work link to someone else’s tank. Scan for before pics of similar issues to yours
Folks should be aware that dosing of oxidizing substances (hydrogen peroxide, Lugols, etc.) or reducing substances (e.g., vitamin C) may well be impacting the speciation of trace elements (e.g., iron in ferric vs ferrous form), and thereby changing the stability and bioavailability of them.
When folks see positive or negative effects, the underlying mechanism may not be as clear cut as the hobbyist thinks (e.g., dosing Lugols and thinking any effect is from the iodine level supplementation as opposed to trace element speciation effects).