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Elton the only reason I type that stuff is because it hasn't been good enough, last twenty years of books and articles about algae control.
I lost a tank I'd put a lot of work into because nobody knew red gelidium can simply be killed independent of all nutrient issues. It's a requisite hitchhiker. Once it's DNA is gone, independent of nutrients, it can't come back until someone non qt's it again. So when it came back in my new reef on euphyllia frags I'd brought in, it was just killed. Haven't seen it since about 2010 ish.
Robert on your algae threads regarding ATS or refugiums to me they are ok if they work and someone can command them well, not downing the many examples they've collected too
But we are unique in our time frame acquisitions and it's another option.
Green hair algae variants and possibly frondy bryopsis mixes like you have Elton are widespread, they bloom by import, light and water, not much we can do. That very light patchy growth speaks amazing to your efforts for water control that didn't strip your corals, if you try a single test patch you will be shocked. I'm advocating reef cheating. That's hard to digest and the crowd doesn't advise it. But I'm telling you the collection of fixes is growing
Look at this zeovit tank
http://reef2reef.com/threads/sick-of-gha-going-to-start-dosing-perxoide.212043/
Yours is not the same challenge and we would not do it this way. This is his preferred mode for a large tank yours is no where near the challenge, work or risk whatsoever. It's to show we have command within a tank that's far worse, yours would be like putting at candy land
live rock and ocean substrates have potentiation built in to pretty much always toss some up. Not denying exacting po4 controls can stop algae for many I'm just claiming thousands of tanks won't respond to total fix of the algae, and they'll carry the load you show after doing the max work. We fix those right up
I can see an easy test for your tank, we simply do nothing tank wide and risk nothing. Establish a proof timeline with s single test patch on a single rock. I claim that spot will die in about two days and not come back for long enough you'll want to do it all. One test patch commits nothing, risks nothing tank wide, and is a direct model of how your rest will go. Each time it goes down like this and if we do it, I'll be using your tank as an example link
The specifics are, both Kent tech m and peroxide are cheats that are algaecidal to the cells, different than just hand removing or essentially mowing and leaving a holdfast. We don't dump this stuff in your tank, that's what the masses do.
we spot access it, not apply it to the whole tank, even if it means working inside your tank, and the chemical burns the spots out and your tank looks perfect going one spot at a time and last months and you are happy = prediction we can retro command live rock. We're about to Caesar Milan that reef rock.
******rocks in the ocean, in wonderful Fiji, grow algae that feed grazers because that's what live rock does, it's rarely po4. Simple nongrazing is the greater cause and true bound nutrients hardly the cause time will show. And more giant threads will show.
My link above prob does have nutrient issues but we were palette cleaning not po4 hunting, first. You have done the opposite, full po4 prepping and no palette cleaning. Merely a direct kill will have slow to hardly any grow back because of your nutrient controls, to me that's the measure of gfo, as the great preventer not remover
We do the removing
I'm having a hard time following your thesis or multiple theses. We should manually remove algae, not strip PO4? We should spot kill with peroxide and or tech M? We need fish to graze? We should use GFO to keep algae out of the tank once it's manually removed?
You're stating this like its controversial. What's the big deal? This doesn't seem groundbreaking to me?



