Hair Algae: The Best Way, The MANY Ways, To Get Rid Of It....


What have you found to be the best things/methods to beat hair algae? (choose all that apply)

  • Hydrogen peroxide

    Votes: 129 16.9%
  • Lawn Mower Blenny (or other fish)

    Votes: 164 21.5%
  • Manual Removal

    Votes: 353 46.2%
  • Rock Scrubbing

    Votes: 160 20.9%
  • Lowered Phosphates

    Votes: 169 22.1%
  • Tank Blackouts

    Votes: 46 6.0%
  • Urchins

    Votes: 147 19.2%
  • Fluconazole

    Votes: 86 11.3%
  • Granular Ferric Oxide (GFO)

    Votes: 71 9.3%
  • UV Sterilizer

    Votes: 69 9.0%
  • Refugium

    Votes: 178 23.3%
  • Algae Scrubber

    Votes: 61 8.0%
  • Clean Up Crew

    Votes: 319 41.8%
  • Lighting Change

    Votes: 59 7.7%
  • Sea Hare

    Votes: 56 7.3%
  • Vibrant

    Votes: 120 15.7%
  • Other (please explain in thread)

    Votes: 52 6.8%

  • Total voters


Owner Administrator
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May 8, 2006
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Hair Algae: The Best Way To Get Rid Of It Is?

Hydrogen peroxide, Lawn Mower Blenny, Manual Removal, Rock Scrubbing, Lowered Phosphates, Tank Blackouts, Urchins, Fluconazole, Granular Ferric Oxide (GFO), UV Sterilizer, Refugium, Algae Scrubber, Clean Up Crew, Lighting Change, Sea Hare, Vibrant etc.

Wait, WHAT?!

There are many reasons as to why you might get an outbreak of hair algae in your tank and along with that many ways that you can also eliminate it. But today let's NOT talk about why you have had a hair algae outbreak but the best ways and methods, you have found, that work best to get rid of it!

What have you found to be the best thing (or combo of things) that finally got rid of your hair algae outbreak?

Before and After by @bwomac44
Untitled-6 copy.jpg


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Jan 28, 2019
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Metro Detroit
I had it a few years back and it was nasty! I tried a few things like Microbacter7, foxface, tangs, snails, etc. What worked best for me was pulling all of it out of the tank, scrubbing it with a toothbrush and then throwing it in a brute can for a month with high heat (84) and a power head. Then I added a Tuxedo Urchin after it all went back in the tank and that little guy kept everything in check.


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Apr 18, 2020
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All great options really to combat nuisance algae (primarily hair), but I think THE BEST option for all tanks is to start off with MANUAL REMOVAL... the more you can get out yourself and bring it down to manageable amount for your clean up crew the better!

Really a fun thread to hear others experiences and what has worked best for them! Also, be a good thread for hobbyists to fall back onto whenever they may possibly encounter a hair algae issue! Nice one @revhtree !


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Apr 1, 2013
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Fargo, ND
I had purchased a used 125 gallon tank 10 years ago, I had it for 2 years until my home burned down. It took two years to beat hair algae and I had one.. Tank was finally looking good when I lost everything in a house fire. It was a neglected tank, I reused the 8 or 9 year old sand bed and reused the former owners sump and rocks, etc.

Things did not go well. MASSIVE outbreak of hair algae. Everything, I took rocks out and scrubbed them, I ran GFO and replaced it every two weeks... List of things I had tried.

1. 3 day black out period.
2. Scrubbing rocks in totes of water change water with bristletooth brushes.
3. Hand pulling every 2-3 days.
4. Massive numbers of snails
5. GFO reactor, changed out every few days.
6. Vodka dosing.
7. Weekly water changes
8. Algae scrubber
9. Scrubbing rocks
10. Acid washing and bleaching my rocks.
11. (while tank was operational, removed a few rocks at a time and acid washed and bleached then cured for 3 monthes in fresh salt water, changing it every 2 weeks to pull out any die off and scrubbing the rocks.

After doing all this, I finally had eliminated hair algae over a 2 year period.


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May 29, 2019
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Scrubbing rocks with toothbrush, manual removal and siphoning out. I try to stay away from chemical as much as possible. Maybe my astrea snails helped a bit, I don't know but now my rocks look very bare almost like an immature tank and struggling to keep beginner SPS alive.


Well known Member and monster tank lover
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Aug 11, 2013
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Wisconsin-Florida in a year
For me.... a combination of:
Reduction in white light intensity
Manual removal by hand
Added snails- astrea/turbo/cerith
Added chemipure elite


More than 25 years reefing
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Oct 30, 2014
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For me its been uv sterilizer for dinos. Snails for film algae. And decorator urchins for hair algae. On the reef algae is controlled by urchins and parrot fish mainly.

Would you consider your tank to be balanced or lopsided when it comes to coral?

  • Balanced Mixed Reef

    Votes: 96 33.3%
  • Lopsided SPS

    Votes: 56 19.4%
  • Lopsided LPS

    Votes: 64 22.2%
  • Lopsided Zoanthids

    Votes: 19 6.6%
  • Lopdsided Soft Corals

    Votes: 42 14.6%
  • Lopsided NPS

    Votes: 1 0.3%
  • Other (please explain)

    Votes: 10 3.5%
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