1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

Grass Carp

Post in 'DIY and General non-hearth advice' started by homebrewz, Aug 16, 2008.

Thread Status:
Not open for further replies.
  1. homebrewz

    homebrewz Minister of Fire

    Joined:
    Nov 29, 2005
    Messages:
    934
    Loc:
    East Central, NY
    Does anyone have any experience with triploid carp, also known as grass carp for weed control in ponds?
    We have a 1/3 acre pond which seems to be regularly infested with the aquatic plant, coontail. We bought
    2 grass carp 3 years ago, but it didn't seem to make much difference. We're considering getting more.
    I've also read that excess plant removal can increase algal blooms.

    Any thoughts?

    Helpful Sponsor Ads!





  2. savageactor7

    savageactor7 Minister of Fire

    Joined:
    Jan 25, 2008
    Messages:
    3,700
    Loc:
    CNY
    We have carp in our pond I see 'em eating grass all the time but we still have water weeds...it's not bad enough to prevent swimming though. Like cows and other grazers they just don't eat everything but they do help.

    For years we used an algicide made by Ciba-Geigy it kept the weeds out, water clear and as far as I know the fish happy. But now you need a pesticide license to buy it...the one weed you have to be ruthless with are the Lilly pads with the white flowers...they'll take right over. I've been able to manage them by carefully spraying round up on 'em. None in the pond now.
  3. Bugboy

    Bugboy New Member

    Joined:
    Mar 5, 2007
    Messages:
    102
    Loc:
    north-central Kansas
    I managed a bunch of ponds and we used the grass carp. They are really hard to strike a correct balance with. We were putting in about 10 per acre and it seemed like they weren't doing anything. After a few years, when they got big, they were eating too much in some ponds. Some vegetation is important to the balance of the other fish.

    It all depends on what the ponds "function" is. If it is for looks or swimming, you could add a bunch more grass carp. If it is a fishing pond, I'd wait a few years to see what the adult sized carp are eating.

    We were doing a electofishing survey on one of the ponds and shocked up a 49 pounder.

    In the ponds that had too many grass carp, we never found a suitable way of removing some of them. They are too spooky for bow-fishing. We never did try a bait and hook. I've heard that some people have made it work though.
  4. Redox

    Redox Minister of Fire

    Joined:
    Feb 23, 2008
    Messages:
    1,099
    Loc:
    Burbs of B'more, MD, Hon!
  5. woodsman23

    woodsman23 Minister of Fire

    Joined:
    Aug 26, 2008
    Messages:
    1,352
    Loc:
    western southern tier of NYS
    You can simply buy a water dye that colors the water blue i believe, This keeps the sun from penetrating to the bottom and checks weed growth. I have grass carp in my pond but am down to one left and he is about 45" long. He eats but can never keep up.
  6. ScottF

    ScottF New Member

    Joined:
    Aug 7, 2008
    Messages:
    411
    Loc:
    Southern NH



    Friends of mine have a lake house where the shoreline has filled in over the years with lilly pads. They cut and cut and they keep coming back. they asked me if I knew of a chemical that would kill them. someone told us 2-4-D but we cant find it anywhere. They said it was legal to use in a lake. Will the roundup do it. I think the main ingredient is 2-4-D. how do you spray them. Wont the water wash off the roundup? I am very interested .
  7. woodsman23

    woodsman23 Minister of Fire

    Joined:
    Aug 26, 2008
    Messages:
    1,352
    Loc:
    western southern tier of NYS
    If you put round up in the water it will kill the weeds and all the fish along with them. There are some chemicals available but with most you need a permit (which is easy to get). maybe a long rake for removal would work as they begin to grow before they get out of hand. My pond is crystal clear and is fed by 4 springs located at different sopts in and around the pond. I have also tapped one and i use it as a main source of water for the house. It flows at 1.5 gallons a minute. My pond is bleow

    Attached Files:

  8. savageactor7

    savageactor7 Minister of Fire

    Joined:
    Jan 25, 2008
    Messages:
    3,700
    Loc:
    CNY
    Scott with the water lilies only I hand spray 'em as they pop threw the water and it kills them...but I don't overdo it, 1 shot will do it. Except for a few shot of spray I don't put any chems in the water now...but that algaecide I use to buy was great. Farmers can still buy it cause they have a pesticide license. With that you can only put it in the pond in the early spring after the ice melts. If you put it in when the water is warm it'll kill the fish...otherwise the fish are fine. Our pond is only 75'x100' so it's real easy to manage. If other weeds in the shallow end become a nuisance I just rake out. Of course the fish need some cover so I'm not too ruthless with the weeds...we just don't want 'em taking over the pond.

    Just for clarity at this point in time I have no lilly pads in the pond but if I see 1 it gets a shot of Round up asap. To me one lilly pad is a show stopper cause I know what a pita they can be.
Thread Status:
Not open for further replies.

Share This Page