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how to remove the black algae from coral rocks?


bigfishhead

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I got some coral rocks from others. It got black algae all over the surface. I tried to brush it and wash it but does not work.

Anyone got any idea to safely remove the black algae from the coral? without use bleach? :bounce: :bounce:

Cheers

buy some flourish excel, and put the rock in a bucket ( just big enough to fit the rock) then fill with hot water and double or even triple dose the thing with flourish, (the algae should start turning red after a 1-3hr hours?)then give it a scrub and a wash in another hot bucket of water. thats how i do it :)

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I use around a cup of bleach in a bucket of water, soak the rocks until they are clean then rinse them off. I usually leave mine in a cold shower for an hour or two. When I can't smell bleach I consider them safe. I have used this method several times and have had no losses.

If you wanted to be extra careful you could leave them to dry for a couple of days.

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:facepalm: I used bleach.....

Soak in the bleach for a week. Most of the black algae gone but still have quite a bit on some of the coral rocks.

I washed rocks carefully during the weekend.

Currently I leave them on my deck for another few weeks... Hopefully the rain will clear the bleach totally.

I will use hot water to wash them at last before i put them into my tank.

Thanks guys!

I will let you guys know if they looks pretty in my tank after few weeks. OR I got whole tank of dead fish.... :nilly: :nilly:

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