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Old 07-22-2006, 10:11 PM   #1
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Algae problem (new Pics)

is this cyano bacteria? if it is is it toxic to the fish or corals?
how do i rid my tank of this?
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Old 07-22-2006, 10:47 PM   #2
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If you are talking about that stuff on your glass then no that is the world famous corraline algea. It mostly grows on your rock but it will grow on your glass. I have alot on my glass also. It`s a good sign. You can easily scrape it off if you dont like it.
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Old 07-22-2006, 10:52 PM   #3
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i have a few spots of coralline i dont think it is coralline because it is to easy to rub off even the colour is not right its transparent reddish purple
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Old 07-22-2006, 10:59 PM   #4
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Oh OK, It looks like it to me but I am wrong if it`s not hard. I dont see it in you substrate which is where it mostly grows.
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Old 07-22-2006, 11:44 PM   #5
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Coralline's color can be light purple to dark red. Maybe you have the early form of the dark red coralline, that's y it's easy to scrub off
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Old 07-23-2006, 12:15 AM   #6
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not to sure hopefully i will get a few more replies Thanks Jenny
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Old 07-23-2006, 02:45 AM   #7
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Cyano is not toxic. It is an indication of poor water quality. Looks like coralline from the photos which becomes more a nusiance than anything else.

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Old 07-23-2006, 10:35 AM   #8
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Hard to tell from the pics. If the algae is hard and stuck to the glass then it is most likely coraline. If it can be brushed away and turns to "dust" it is most likely cycno. This is an indication of excess nutrients in the water. Most often the culprit is PO4. Test your tank water and source water for PO4 to get started.
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Old 07-23-2006, 11:35 AM   #9
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So if it is PO4.....what can you do about it?

My tank is over 6 months old, and I have no coralline growth.....just cyano and diatom blooms. And there is PLEANTY of it on the rocks in the tank.

Should I scrape some off a rock to help it spread it self?
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Old 07-23-2006, 11:55 AM   #10
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removing the food source will certainly help. Do top offs and PWC with high quality ro/di water that has tested free of PO4. Thaw and rinse all fozen food prior to adding it to the tank and cut back on flake food if you use it.
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