Need some brown algae help! - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 01-08-2013, 04:54 PM Thread Starter
Arrow Need some brown algae help!

I have a guppy tank that is covered with brown algae and would like to get rid of it. I have tried getting rid of it by cleaning the aquarium sides, dipping the rocks and decorations in hot water but it seems useless. please help.
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post #2 of 3 Old 01-08-2013, 05:19 PM
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Is this a new tank? My guppy tank had some brown algae during the first month or two of being set up. I would scrub it off the sides and it would come back later.

If your tank is new, I would suggest cutting down on the amount of time you have the lights on, and just keep up with water changes. It should go away in a little while.

happy owner of a wild type GFP axolotl named Percival and too many guppies to count.
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post #3 of 3 Old 01-08-2013, 05:24 PM
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We also need to be certain as to what the "brown algae" actually is. Usually we are dealing with diatoms, commonly referred to as brown algae, and Dragon has correctly commented on that.

But another true algae, actually a green/red type that looks very brown, is a very different issue.

If you can easily remove it with your fingers from decor, plant leaves, etc., then it is diatoms. But if it will not come off without hard scraping, that is the true algae. This is due to light and nutrients.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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