Brown algae in my 10 gallon - The Planted Tank Forum
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post #1 of 4 (permalink) Old 01-20-2014, 10:58 AM Thread Starter
Algae Grower
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Brown algae in my 10 gallon

Okay so I have a little 10 gallon that was gifted to me from my brother. He had it prior to me and never had any problems and I haven't changed any settings. However I was wondering if this could be happening due to the light bulb getting old? Perhaps something changing with the spectrum?

It's a T8 single bulb hood going on a year old . I was thinking about getting a Marineland Double Bright LED for it. I just grow a few plants but I really like the small tank and want to make it pop.

Thanks for any help!
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post #2 of 4 (permalink) Old 01-20-2014, 11:37 AM Thread Starter
Algae Grower
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Also, it's not a lot of brown algae. It's very slow growing on the bottom of the front and back glass
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post #3 of 4 (permalink) Old 01-20-2014, 01:20 PM
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Its just diatoms. I have high silicas in my water and get the same thing. It occurs in all of my tanks to some level. I would just scrub it off. If the light really is old, replace it.

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post #4 of 4 (permalink) Old 01-20-2014, 02:14 PM
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As mentioned, dissolved silicates in your water supply feeding diatom growth. Rather common. I breed angelfish, run barebottom tanks through 90% of the tanks I own, do 20% daily and 50% weekly water changes on those tanks and I still have to scrape it off by the time the next 50% WC comes around in a week's time. You may find filter media that will absorb silicates. I've found that using Purigen slows diatom growth significantly, but doesn't eliminate it. Snails love the stuff. By comparison, my 180G planted low-tech has a mix of snails and I haven't scraped that glass since the spring.
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