brandon429
Active member
Anthony thanks for the pics. this will be a heck of a job but its just the kind of challenge I want for sure. Pics always change up the diagnosis, lemme tell you what Im brainstorming:
The sandbed doesn't look especially cruddy with waste, so that doesn't strike me as a source of nutrients. But there are some we need to contend with
Im a little concerned that a tank this new has that much eutrophication, makes me wonder where the phophates and nitrates came from. I'll need to go back and re read if that rock was used etc.
This won't affect the initial kill. That kind of GHA is easily offed by peroxide 3% from a new bottle, don't use an old one.
it should die within about 5 days to the point its falling off or easily removed.
if at all possible Id like to see the effort made to remove and treat the rocks externally. I noticed the glistening tentacles of what looks like a euphyllia glabrescens or similar LPS coral and an in-tank treatment at a ratio high enough to zap that algae might stress it.
so our ideal options are two fold: make an in tank regimen slightly higher than the usual 1:10 dosing to speed up the kill of that much algae, and it takes a long time (maybe faster if you use tarped submerged spot treatments) but requires no rockwork
optn 2 is ideal
remove the rocks and target soak them externally, heavily, with several bottles of straight 3% letting them soak a long time sitting on a towel somewhere not underwater. letting that peroxide sink in really good. soak them over and over a few times while removing physically what you can of those clumps of gha. The peroxide is attacking whats left behind. rinse rocks off very well and rescape.
This optn 2 allows you to siphon out detritus from up under the rocks if any. Its a hassle to rescape I know, but worth it IMO as the prescription here because the tank is fairly new and not packed with corals, this is the -ideal- candidate for a 30 pack of beer and several hours on a weekend w peroxide. that will get you the fastest results hands down
long term prognosis, the fun part
We need to see where the nutrients are coming from. If it was just a little bit of algae Id say peroxide wipe it and call it a day, but this much primary producer eutrophication indicates a heckuva phosphate store somewhere and it could be the rock. Sandbed doesn't look all that bad.
To test, you'll need to get or find someone with an ultra sensitive po4 test kit and get a bucket of clean saltwater you are assured tests 0 for po4
you set a test rock in that bucket for a week and test po4 afterwards, see if it rises. If so, then the initial kill the peroxide will certainly provide may manifest as a slow regrowth but at least the peroxide will catch you up fast. You may use rock cooking, lanthanum chloride dosing, and or GFO at that point to arrest this phosphate potential store.
But I recommend we hit with peroxide first, because even though its a lot of armwork to get in a tank that big your tank just might be some of the ones that respond to direct kills with none of this phosphate hunting. lanthanum and acid etching usually are way more in depth and a potential restart of the whole tank, whereas peroxide lets you keep everything running.
summary:
we can easily kill all that algae, I don't know how fast it will grow back but you will def get a clean tank out of a dedicated peroxide application either way you run it. In tank is a long time for dieoff, easiest work, external treatments are big work and fast dieoff back down to the base rock. Might require a second treatment on some areas that were particularly infested with holdfasts from the algae etc but you'll get a huge response off the very first run thats for sure.
Take out and dose just one easy test rock right off the top just to see, thats a no commitment option just to test. an external treatment on just one rock off the top...see what it does in two days
The sandbed doesn't look especially cruddy with waste, so that doesn't strike me as a source of nutrients. But there are some we need to contend with
Im a little concerned that a tank this new has that much eutrophication, makes me wonder where the phophates and nitrates came from. I'll need to go back and re read if that rock was used etc.
This won't affect the initial kill. That kind of GHA is easily offed by peroxide 3% from a new bottle, don't use an old one.
it should die within about 5 days to the point its falling off or easily removed.
if at all possible Id like to see the effort made to remove and treat the rocks externally. I noticed the glistening tentacles of what looks like a euphyllia glabrescens or similar LPS coral and an in-tank treatment at a ratio high enough to zap that algae might stress it.
so our ideal options are two fold: make an in tank regimen slightly higher than the usual 1:10 dosing to speed up the kill of that much algae, and it takes a long time (maybe faster if you use tarped submerged spot treatments) but requires no rockwork
optn 2 is ideal
remove the rocks and target soak them externally, heavily, with several bottles of straight 3% letting them soak a long time sitting on a towel somewhere not underwater. letting that peroxide sink in really good. soak them over and over a few times while removing physically what you can of those clumps of gha. The peroxide is attacking whats left behind. rinse rocks off very well and rescape.
This optn 2 allows you to siphon out detritus from up under the rocks if any. Its a hassle to rescape I know, but worth it IMO as the prescription here because the tank is fairly new and not packed with corals, this is the -ideal- candidate for a 30 pack of beer and several hours on a weekend w peroxide. that will get you the fastest results hands down
long term prognosis, the fun part

We need to see where the nutrients are coming from. If it was just a little bit of algae Id say peroxide wipe it and call it a day, but this much primary producer eutrophication indicates a heckuva phosphate store somewhere and it could be the rock. Sandbed doesn't look all that bad.
To test, you'll need to get or find someone with an ultra sensitive po4 test kit and get a bucket of clean saltwater you are assured tests 0 for po4
you set a test rock in that bucket for a week and test po4 afterwards, see if it rises. If so, then the initial kill the peroxide will certainly provide may manifest as a slow regrowth but at least the peroxide will catch you up fast. You may use rock cooking, lanthanum chloride dosing, and or GFO at that point to arrest this phosphate potential store.
But I recommend we hit with peroxide first, because even though its a lot of armwork to get in a tank that big your tank just might be some of the ones that respond to direct kills with none of this phosphate hunting. lanthanum and acid etching usually are way more in depth and a potential restart of the whole tank, whereas peroxide lets you keep everything running.
summary:
we can easily kill all that algae, I don't know how fast it will grow back but you will def get a clean tank out of a dedicated peroxide application either way you run it. In tank is a long time for dieoff, easiest work, external treatments are big work and fast dieoff back down to the base rock. Might require a second treatment on some areas that were particularly infested with holdfasts from the algae etc but you'll get a huge response off the very first run thats for sure.
Take out and dose just one easy test rock right off the top just to see, thats a no commitment option just to test. an external treatment on just one rock off the top...see what it does in two days