Fish Pond how to get off the algae?

i have a big fish pond and in it i have 6 kois, the water gets very green from the algae which make it hard to see the fish even with the pond lighting, i used algae controls but still the same someone told me to paint the pond with a black paint so the algae don’t grow in it. what kind of paint should i use my pond is made of concert .

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7 Responses to “Fish Pond how to get off the algae?”

  • do.drop says:

    try talking to a fish store for one. Try alge eaters, there quite harty and will amaze you. Again, talk to your fish store.

  • saaanen says:

    I have 2 water gardens with gold fish. I, too, have an algae problem, but it’s caused by sun and heat. I won’t have koi so I can enjoy plants. I have about 70% of the surface shaded with duck weed, lily pads, and hyacinths. Nothing will prevent the algae. I have heard that tinting the water blue helps.

  • RScott says:

    I’ve been using barley straw for five years on my two ponds with great results. As a result of my success the county is going to try it this spring on a 27 acre lake. Here’s a good link http://www.btny.purdue.edu/pubs/APM/APM-1-W.pdf RScott

  • Isadora says:

    If it is a new pond and you have just changed the water, or keep changing it to clear it up, stop doing that. The normal process with a new pond is what it called an algae bloom that clears up in 6-8 weeks, if you leave it alone. it is helpful if you can have 60% of the water surface coveredwith plants but I know that isn’t practical with Koi that are vegetation eaters. Don’t add chemicals to clear it up, they are bad for other plants and fish. You do need a good filter on your pump if you don’t have one. Barley will help clear up the algae problem also, you can get bundles of it at your garden center. It takes a little time to clear it up, but it does work, even on filamentous algae which is notoriously hard to get rid of. You just toss it in, it will float for a while and then sink to the bottom so you don’t see it.

    You can get a pool paint for your cement pool, it is a two-part epoxy. You have to let it cure thoroughly before you put your fish back in. We used it on concrete fish tanks at the nursery where I worked. Be sure you get one that is non-toxic. I believe they use it to paint the insides of stock tanks, so you might be able to get it at a farm supply store.

    The fish don’t care if the water is green; it is the humans that don’t like it.

  • colin m says:

    1. you need to shade the pond, to much light = heavy algae.

    2 improved filtration,

    3 do not paint till you talk to an expert..

    4 remove pond lighting.

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