Well I bought some peroxide today... planning on some systemic treatment in tank.
My rockwork is fixed, I cannot get any of it out of the tank, everything was bonded together in tank. Corals are mostly SPS, with a couple zoanthids. Toadstool leather, duncans, acan frag, frogspawn, maze coral and a war coral and that's it for non sps stuff.
I also have a large 12" RBTA, some pulsing xenia (which I wouldn't mind if the h2o2 wiped it out personally).
Inverts are various snails, astrea, cerith, narssius, some emerald crabs, 2 peppermint shrimp, large brittle star and millions of tiny brittle stars.
I just went through mag raising to kill some bryopsis which worked, and then went to algaefix marine for what I thought was normal GHA, but apparently it's derbesia and it's not being affected at all. It's taken strong foothold on the left side of my rock work, and I'm planning on shooting those spots with h2o2 through a syringe inside the tank each day. I plan on a max doseage of 5ml every other day using this method so as not to effect the rest of the tank. The tank is a 75g with a 20L sump.
Any other input or ideas?