Country living, DIY, & a Dash of Fun!

Kill Algae in Fountains with Peroxide

Well it’s that time of year here in the valley of the sun where anywhere there’s water sitting outside, there is sure to be algae.  Algae loves sunshine and warmer weather so you can imagine how fast this stuff can grow anywhere it’s warm!

I noticed my little fountain had started to get clogged with algae…the water basin was covered in a layer of algae and the water shooting out of the water spout can was becoming just a trickle instead of it’s normal steady stream.  I knew I could easily scrub the water basin with a scrubby to clean it out but how in the world was I going to get the algae out of the tube that ran from the water basin up to the water spout???

A little peroxide!

Here is a video of my little fountain before I treated it with peroxide and then after…it made a HUGE difference! 😉

I was a little concerned about my hummingbirds that come to drink out of my fountain after adding the peroxide so I did some research.  Apparently, many pond experts have been using this method for over 10 years and have never had any issues with it affecting their wildlife, coy fish, snails, amphibians, or any other living creature that lived in (or drank from) their ponds.  Double Yay!

For routine maintenance use about 3/4 -1oz of peroxide per 100gallons of water once a week. For excessive algae use 2-3oz. of peroxide per 100gallons and repeat in a few days.

For my little 3 gallon fountain all I did was squeeze a few squirts of peroxide into the water basin (probably about 1tbsp), then I waited a day and let it run through the system…

The water tube that shoots the water to the top of the water spout was almost completely clogged with algae before the treatment…

A day after treatment, I blew on the one end of the tube and this is what came shooting out!  Awesome!

FYI- The dying algae will start letting go of the sides of the fountain and water basin, and begin to float through the system…clogging the pond pump filter.  Since I only have a 3 gallon fountain, I simply just replaced the water.  For larger ponds and fountains where you can’t just replace the water, make sure to clean the filter often to prevent it clogging with this stuff.

In an instant, my fountain was working normally again!!  Yay!!!

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8 Comments

  1. Marie Lutzow

    I never knew about peroxide and fountains! I have one on my wall and one outside in the garden. Love that I can now use a cheap, safe alternative to bleach, and a full shutdown each time I had to clean. Thank you for sharing!
    I love your blog, I am a new reader, having come across your blog after seeing your cat enclosure, and instantly knowing I want one! Marie

    • Tee

      Thank you for writing Marie! I appreciate your sweet comments! You will have to post a picture of the cat enclosure if you made one too! 🙂

  2. Theresa

    Thanks will try today. Theresa

  3. Denise

    Hello
    I am so happy to hear this info about peroxide! Unfortunately, the guys that installed my water feature told me to use bleach. I didn’t use much but then couldn’t figure out why the birds weren’t coming to visit! This is great! My sons dog comes and drinks it too! By then bleach had dissipated but this is good info since this is all new to me! ! Now I can KEEP it clean rather than turn it off and then powered wash …and then add a little bleach ! It is in a sunny spot! I did not realize that the sun contributes to the algae opposed to moss! Do you recommend any plants that can go in the water feature for healthy growth? It is considered “ pondless” although water can be more prevalent after big rain! There is nothing swimming in it, but it has a nice flow to it! Thanks for any info!

    • Tee

      Hi Denise,
      I’m so glad you enjoyed my post! Yes, I much prefer peroxide over bleach just as you do because of the wild life 🙂 Living here in the Arizona desert, algae is a very normal thing because of the warm temps. Hmm…I’m not sure which plants would be best for a water feature but I’m sure if you went down to a nursery, they could tell you. So glad you dropped in to say Hello!

  4. Helen

    What if you have mosquito fish in the pond. Will the peroxide harm them?

    • Tee

      Hi Helen,
      Good question! I found this info at Pond Wiki:
      “Hydrogen peroxide directly comes in contact with the algae and will kill it. This chemical dissipates very quickly into the water, so you don’t need to remove the fishes from the pond. It is an easy and convenient way to kill algae.”

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