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Old 10-18-2020, 10:04 AM   #1
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Brown algae

My 75 gallon is in the middle of cycling now and over the last week Iíve gotten a lot of brown algae on some of my artificial plants and decorations. Iíve read that routine 20-25% water changes will help this, but wanted to see if anyone else had some ideas on how to best get rid of it. Does this mean the cycling is complete? Iíve tested my water and the levels have dropped a bit but not much. Thanks in advance and look forward to hearing from you all.

John
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Old 10-18-2020, 12:24 PM   #2
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The brown algae is diatoms. Not technically an algae but microscopic creatures. They are taking advantage of inbalances in nutrients in the water, namely silicates and nitrates.

Perfectly normal to see this during a cycle and should clear up on its own when your tank is properly cycled and everything gets back into balance and the silicates are consumed.

Are you doing a fishless or fish in cycle?

Ways of dealing with brown algae without just waiting it out.

- Simply clean it off the surfaces. It will wipe of quite easily.
- Water changes as you suggest. This will remove nitrates and therefore one of its food surfaces.
- Turn up the lights. Green algae will algae will out compete the brown algae. Green algae is easier to deal with. Many more aquarium species will eat green algae than brown, or going with real plants which can in turn out compete the green algae.
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Old 10-18-2020, 01:49 PM   #3
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Originally Posted by Aiken Drum View Post
The brown algae is diatoms. Not technically an algae but microscopic creatures. They are taking advantage of inbalances in nutrients in the water, namely silicates and nitrates.

Perfectly normal to see this during a cycle and should clear up on its own when your tank is properly cycled and everything gets back into balance and the silicates are consumed.

Are you doing a fishless or fish in cycle?

Ways of dealing with brown algae without just waiting it out.

- Simply clean it off the surfaces. It will wipe of quite easily.
- Water changes as you suggest. This will remove nitrates and therefore one of its food surfaces.
- Turn up the lights. Green algae will algae will out compete the brown algae. Green algae is easier to deal with. Many more aquarium species will eat green algae than brown, or going with real plants which can in turn out compete the green algae.


Thank you! I have a NICREW LED light on full power about 8 hours a day. I just did a 25% water change and gently wiped off the plants, still a bit there but much improved. I am doing a fish in cycle this time. When I first set the tank up a couple of months ago I used bottom shelf products and it just didnít work out, I stocked 8 fish and 6 of them died within a month. So I started this cycle about two weeks ago with seachem stability and Iím starting to see my levels go down a small bit. Hopefully on the right track, and also havenít lost a fish in a few weeks.
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Old 10-18-2020, 07:03 PM   #4
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Yeah diatoms. Will be there for up to 4 months...
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Old 10-18-2020, 07:05 PM   #5
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Yeah diatoms. Will be there for up to 4 months...


Thank you, would a couple of algae eaters or snails work to get rid of this quicker or will my cichlids eat them? Cichlids are between 2-3 inches long
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Old 10-18-2020, 07:09 PM   #6
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Thank you, would a couple of algae eaters or snails work to get rid of this quicker or will my cichlids eat them? Cichlids are between 2-3 inches long
I don't think so, they might. It's just a waiting game...
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Old 10-18-2020, 07:12 PM   #7
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I don't think so, they might. It's just a waiting game...


It is still mid cycle as well so Iím going to give it a couple more weeks at least
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