Those pics side by side tell the exact tale as I envision the process, thanks so so much!
these side by side pics are the perfect summary to the peroxide method, its pros and cons:
-undeniably, you did not recycle your tank. you did not affect your in house bacteria so we have utterly destroyed the #1 old assumption about peroxide use many times over in this thread, the old adage that using it will sterilize your tank and kill all the pods etc. we know how to apply it carefully to avoid that, even if other posters elsewhere managed to nuke their tank or sps with 3%. thats not happening here. its simply not occuring here page after page.
Playing devils advocate for the staunchest anti-peroxide posters out there, if peroxide does have an initial impact on bacteria, we can't quantify that in any way, neither could Randy Holmes Farley when I asked him about it in a thread in the chem forum which can still be dug up, and magically these corals above dont seem to care much. Obviously the bacteria rebound quickly enough such that no ammonia escapes oxidation or we would be having mass ammonia problems in this thread.
Zero proof exists that peroxide use in a reef tank negatively impacts nitrifying bacteria. The challenge exists to find the link or abstract and post it here, a link to aquarium studies and peroxide. we are actually developing quite a testament to the null hypothesis, perhaps it actually boosts filtration bacteria by boosting the overall oxygen content aerobes relish (just a guess)
We also are not getting ANY reports of nitrate spikes, which would indicate an action on the anaerobes from our tanks. Some loss of pods has been noted in full rock dips> who cares, they'll repopulate from other areas in the tank. there is a price in curing algae problems long after that first rock was overtaken.
-our method simply kills a target it is not better or worse than another method. If you have access to your rock or tank targets and would like that algae gone, use it. If you prefer a long drawn out battle over phosphates to beat algae, select that method or use a combo.
Nobody is saying this is the best way to fight algae, what we like to do here is -safe- applications that preserve your non targets and try and make predictions about what will happen to your targets. if your target doesnt die, no prob, try something else.
ID of target species is typically not needed here, we just zap. The target above could be one of ~twenty species we refer to as GHA collectively. ID'ing algae correctly is very hard to do, I respect guys like plantbrain who can. Plantbrain from the macros forum is a very powerful resource of plant info, i was actually talking to him online when the web was quite new in 1995 regarding the action of actinic light on aquatic plants and Ive never forgotten how smart he is. amazing to see him still here today. dang near 20 yrs later he still typing plant info wow and you can speak to him any way you need in the macros forum here. he hangs out on plantedtank.net too for obvious reasons.
3% has a very high percentage of cures/kills on green hair algae which I rate as the #1 best algae to treat with it depending on your setup, which is why your pics look so great post treatment. I rate neomeris annulata as the algae least likely to respond to peroxide and if you get that in your tank simply burn the whole tank to the ground and never reef again.
What the pics show above is a simple reset. This is what RCharlieSam's tank looked like before it got algae invaded through whatever the primary cause was./ Now that its reset, continue as you please. In my tank I simply repeat as needed. You can choose better lighting or po4 binding going forward, algae scrubbers etc, but in the end if they let you down, you know for a fact how to always reset.
even though its a little self serving to say, I still feel Charlie's best bet was the peroxide. You can hook up GFO and wait weeks for dieoff and it very well could be sustained, but oh how much quicker was this, and, you can still use the GFO in its correct place as a preventative and not a remover of algae.
I stand by the statement that Charlie's tanks chemistry was least overall impacted by the brief peroxide work compared to any other method that truly does shock a system into compliance. This is just pure results pictured above, Id be curious to know in two mos how well things are holding up no matter what you do to your nutrient controls.
Thanks for great great pics
B