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Old 08-06-2014, 05:08 AM   #1 
Jellybelly
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Join Date: Oct 2013
Bright green algae taking over betta tank

I have had my betta for 18 months in the same tank, 24 x 18 x 18 inch. There is a heater and air bubble filter and it was well planted until recently. A bright green algae seems to be taking over the tank! It grows on the glass, the heater, the filter and on the gravel at an alarming rate. Seriously, this stuff takes over the gravel within a week. It is thick, bright and grows like crazy!

Will it hurt my betta?

I keep scraping it off the glass and other things and scooping up the gravel that is covered with it, but it comes back. There is hardly any gravel left in the tank now! I threw out all the plants because they were covered with it. I replaced the fluoro light with a new one. The heater is set at 24 c. There is no direct sun hitting the tank. It's as if an algae invasion dropped out of the sky and hit his tank!

I would like to go back to a nice, well planted little home for my boy, not an algae covered icky mess. It is mainly the thick carpet of algae on the gravel that worries me. Any thoughts anyone?

Thank you in advance for your help.
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Old 08-06-2014, 07:36 AM   #2 
mart
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Agent green is great stuff.
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Old 08-06-2014, 08:32 AM   #3 
Veloran
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Your basic problem is too many plant nutrients going in and not enough coming out. Taking the plants out probably just hastened the process.

Before tossing chemicals in, I'd try eliminating the source of the problem.
More frequent water changes.
Lower the amount of time your light is on.
Add some fast growing plants.

If you still want the chemical option, I hear good things about Seachem Flourish Excel.
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Old 08-06-2014, 08:53 AM   #4 
mart
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I use Excel in one of my plant only tanks, and there is green Algae in it.
I use Agent Green in all my other tanks, and I have 0 algae.
And Agent Green is less chemical than Excel. Excel has a warning it may cause sensitivity to breathing.
Agent green is made from a combination of minerals.
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Old 08-07-2014, 04:26 AM   #5 
Jellybelly
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Thank you Matt and Veloran.

I would prefer not to use chemicals.

I was concerned the carpet of green algae would make my betta sick, mainly because of the speed at which it was growing. Should I leave the algae carpet on the gravel? It's not that I care so much about what it looks like, so long as it isn't harming him.
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Old 08-07-2014, 03:21 PM   #6 
Veloran
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Its not going to harm him, just unsightly.
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