That's great to hear about the tank!
√ support trying vibrant simply because a large number of tanks in the vibrant thread showed good results. In my opinion any cyano should be battled by full hand cleaning first, then actions taken to the water only in the absent/cleaned condition
Dosing X to a tank with cyano clearly accumulated makes the job harder for X
Is far easier to suppress a regrowth vs have a single dose both kill and facilitate breakdown all in tank
The hand removal can be expected to be cyclic for a while as reefs will do, and bluer settings on the lighting vs whites is helping many as well in combination
Peroxide rates low imo on the scale of good cyano cures dosed into water based on thread offerings. It's very predictable in terms of tolerant organisms as a benefit and like you mentioned lysmata are unlikely to survive it going off post statistics.
Can it work as a regrowth preventer? Yes. But if it was my large tank there'd be a UV inline to cheat burn any monerans long before they aggregated ~ + hand removal.
I guide cyano right out of my pico tank and it appears predictably when laziness sets in. the accumulations come back when sandbed starts to accumulate and stay gone months between bed cleanings.
cyano \ spirulina and species of green micro algae classify as recurring invaders in a reef tank due to distribution modes. They wind up in street pushes.
Cyclic in battle, not an indicator of things wrong when they show up... expected and dealt w. is how I view cyano battling. I see it opposite of green hair algae battling.
Green hair algae or bryopsis or invasive dinos are requisite hitch hikers and potential invaders, so I like to remove them by damaging the rock anchor surface lightly, then externally treat the cleaned area with 35% direct. Algae will not build mass in those conditions and imported invaders can be forced out such that over five years now only the cyano shows up in my tank to reflect on over feeding or export laziness
Gha and variants do not grow on the rocks, it's solid coralline I've done zero algae work on rocks in five years and I have no grazers, fish, (coral only) and no more frag imports (all full) so the only invaders I'll ever see are the ones that cross-contaminate from the natural environment (air and water vectors)
I believe fierce hand guiding, knives as rock picks as needed + powerful surface burn with chem cannot be equalled for selecting out anchored invaders in a reef tank. Peroxide as an attempt in the 1:10 ratio is typically safe we show but truly I never dump anything in my water but cyclopeeze and rods food chunks.
Tank draining and then accessing the surfaces once needed with needle-delivered 35% peroxide blasted out any gha its simply gone and not part of the tank biota I hope.
