I'm loosing the war with GHA, help?!

[Der_Iron_Chef]

Best of luck, Catherine! I hope it disappears for ya

[Chin_Lee]

Catharine i read this awhile ago from several reefers and I never tried it until last month and I can confirm that this undisputedly worked for me.
I had 5 patches of GHA that would not go away. My rabbitfish stopped eating it as soon as it learned that nori tasted much better. So I finally tried this method which is applying hot boiling water directly onto the GHA. Initiallly I tried doing it with a turkey baster several times before and didn't work well because the hot gases in the baster pushed out the hot water as soon as i sucked it up and lifted it out of the hot water container.
I finally got one of the flexible rubbermaid containers that looks like this:


I removed the white straw tab on the cap and you will see a hole on the cap that lets the liquid out into the white straw tab. This hole will fit a 1/4" flexible hose very snugly. Insert a hose that is long enough to manuever under and around rocks.
Turn off all tank water circulation devices.
Pour hot boiling scalding hot water into the bottle, cap it up,
Turn the bottle upside down into your tank, and squirt the hot water all over a good sized patch of GHA.
Squirt slowly so the hot water "lingers" on the GHA.

Depending on your tank size, I would consider target one rock at a time. Continue doing this until you've targeted all your rocks and then start again from the beginning. You will start seeting GHA shedding off the next day so make sure you clean the powerhead intakes or overflow intakes.
Keep your skimmer skimming WET! this will ensure the dying GHA doesn't fuel more nutrients into your tank.
If you have corals nearby, move them before doing this if you are concerned. My acros didn't seem to care or mind when I did it when them nearby.
Some people will argue that this will kill your liverock's bacteria. I will argue that it will kill your GHA and some bacteria on the surface under the GHA but your liverock's inside bacteria will be fine.
Similarly, this product could work too but harder to apply under rocks without the hose attachment.

Seriously, try this method first. If you are apprehensive, do it to one or two rocks first. My GHA patches disappeared after a week and I am currently GHA free.

[andresont]

As i am too, a happy BB tank owner i second Kadaytar's comments re:sand, skimmer and flow.

I would get rid of the CrapTrap i.e. sand for sure. even though you do have sand sifters, detritus is still there and lots of it. It will not go away unless syphoned out.
I was not in favor of BB tank myself before, but OMG how much crap is trapped in that sand ! I only have 1 tiny Tang, one clown and few tiny gobyes in my 60gal, but still a LOT of detritus needs to be syphoned every week. And that is with enormous ammount of flow and decent skimmer.

JM2CW

[bv_reefer]

-that hot water in water bottle technique sounds reasonable and i would try it but the patches of algae are 2'' above my condy anemone, so i'm a little apprehensive @ the moment-

[fishface]

i second the boiling water as well. i got rid of a bryopsis problem with that method.

[Chin_Lee]

Originally Posted by bv_reefer

-that hot water in water bottle technique sounds reasonable and i would try it but the patches of algae are 2'' above my condy anemone, so i'm a little apprehensive @ the moment-

2" is plenty of room for this. if you are still cautious, cover the anenome with saran wrap before applying.

[michika]

Thanks Chin_Lee I'll take a look around for a bottle like that, and maybe I'll try it this week.

There is however some good news. I think its pretty safe to say that there is no more nutrients feeding the GHA. I say this because any of the places that the urchin has cleaned have remained cleaned for 2 weeks now. The algae does not regrow after Lurchin' Urch has cleaned an area.

[Chin_Lee]

Originally Posted by michika

Thanks Chin_Lee I'll take a look around for a bottle like that, and maybe I'll try it this week.

There is however some good news. I think its pretty safe to say that there is no more nutrients feeding the GHA. I say this because any of the places that the urchin has cleaned have remained cleaned for 2 weeks now. The algae does not regrow after Lurchin' Urch has cleaned an area.

i think thats the problem with GHA in that once you have it, its not going to just disappear on its own. Like all other organisms in the tank, each and everyone is competing for something. In the case of GHA, its nutrients and as long as you have something or anything that is producing waste (fish/pods/inverts/bacteria on liverock) it will be able to sustain itself. It may not thrive and spread when the nutrient levels are low but there is always something in the tank that will provide just enough nutrients for it to stay.................... or until you decide to poach them.

[scsi]

add a couple of Sea Hare's.....
See my tank Journal post.
They're mowing down GHA like crazy.....