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post #1 of 8 Old 04-02-2011, 10:59 PM Thread Starter
Help with algae

I came back from vacation and found this algae on one side of the tank towards the bottom i cant tell if its blue green algae or if its green spot algae and what is the best way of getting rid of it i have been doing 10% water changes daily
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post #2 of 8 Old 04-02-2011, 11:14 PM
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get an algae sponge and scrub, change the lightbulb, use a razor blade. keep doing water changes
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post #3 of 8 Old 04-02-2011, 11:36 PM Thread Starter
Yea i have already cleaned i just dont want it growing back i should note its an established tank and light is on for 8 hours a day if i change the light what should i get
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post #4 of 8 Old 04-02-2011, 11:41 PM
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just change the bulb. Over time a bulb begins to lean more towards the yellow, orange, and red areas of the color spectrum which is favorable to algae. Changing the bulb will bring the spectrum back into the blue range
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post #5 of 8 Old 04-03-2011, 02:38 PM
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That is very true, but if there are no live plants in the tank, any light will cause algae. Algae is just a plant, so it needs light and nutrients. Live plants will keep it under control because they out-compete algae for the nutrients and light.

Algae is natural in any water system, and if you don't have live plants, it is not really a problem. It coats plant leaves, literally choking them, which is its downside, but in plant-less tanks, it is actually useful as it uses the nutrients.

By the way, doing small water changes wil have little if any effect on algae.


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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post #6 of 8 Old 04-04-2011, 10:30 PM
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looks like diatoms to me.
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post #7 of 8 Old 04-04-2011, 10:42 PM Thread Starter
Im guesing if i get plants it will help control the amount of nitrates in the tank
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post #8 of 8 Old 04-04-2011, 11:17 PM
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Adding plants is an all around good idea. As noted, they can outcompete algae for nutrients. And you are correct, they do absorb nitrates, but they prefer ammonium, which if not present naturaly as in more basic water they will convert toxic ammonia to useable ammonium. So you are knocking out two (or more) birds with one stone, so to say; cleaner, healthier water, and less time spent cleaning the galss.
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