Black algae - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 20 Old 08-10-2008, 10:22 PM Thread Starter
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Black algae

Does hair algae turm black on plants? I am getting a lot of it on my plants. My nitrates are 40ppm . I have a 55 gal tank with a lot of sword plants and some wisteria, I am not overstocked, and my tap water test at 5ppm for nitrates. CF lighting is 130 watts kept on for 10 hours a day, I feed lightly once daily, when you black out a tank for 3 dats to kill algae do you need to cover it, or just leave light off? thank you on advance
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post #2 of 20 Old 08-10-2008, 11:16 PM
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If you have plants I probably wouldn't do a black out. But I had that algae.. I started just using my nail and taking it off the plants that way... But now its growing on my gravel.. So I'm interested to see what someone tells you.

And just before you laid dead weight upon its shores, I stung you in the face for that's the nature of my core.
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post #3 of 20 Old 08-11-2008, 02:56 AM
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Are you talking about staghorn? If so, it can be easily removed with Flourish Excel, a CO2 fertilizer. You can spray it directly on the plants using a syringe or you can just overdose it for your whole tank. Kills a variety of algae really well - unfortunately it is also known to kill some plants and shrimp really well. Do your research first.[/code]
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post #4 of 20 Old 08-11-2008, 10:30 AM
wait a fertilizer will kill algae? I have the same back stuff on my plants that my otos seem to take a chunk out of once in a while. But it grows faster then the chunks ebign taken off so tis still a problem for me
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post #5 of 20 Old 08-11-2008, 04:37 PM
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The reason you've got so much algae is because your nitrates are 40ppm. They really should be kept under 20ppm, so I'd recommend doing more frequent water changes.
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post #6 of 20 Old 08-11-2008, 06:18 PM Thread Starter
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So if I do more water changes and get the nitrates down to 20 ppm or less the black algae will die and go away. or do I need to OD the excel, and if so , how much?
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post #7 of 20 Old 08-11-2008, 10:54 PM
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First CONFIRM the algae type. There is an effective way of killing most algae, but messing with Excel can be very dangerous! Excel is not your standard fertilizer, it is organic CO2 (can be used to provide small tanks with CO2). It is known to kill some plants and possibly shrimps.

Here is an excellent page on algae: http://www.theplantedtank.co.uk/algae.htm
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post #8 of 20 Old 08-11-2008, 11:41 PM
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I second Excel. I can't believe how well this stuff works.

I took the standard weekly amount to use and dosed 3x that for 3 days in a row. Algae all turned brown and died off within a week.

Only side affect was a huge plant bloom. When I pruned, I had more to dispose of then was left in the tank!

Best product out there for the $$.

Be careful to check side effects of your fish types.
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post #9 of 20 Old 08-12-2008, 06:37 PM Thread Starter
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I have mostly sword plants in my tank. My fish are Angels, platties, some glowkight, a pleco and cory. Is excel dangerous to any of these, Thank you for the help
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post #10 of 20 Old 08-12-2008, 11:34 PM
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No, they should be fine. If there are only isolated outbreaks of algae, spot-treat the areas; if that would be too complicated, just double the recommended Excel dose and kill those suckers. BLAM! DIE, YOU $#%@#^, bwahaha!!!
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