Help with aquatic application

Discussion in 'Pesticide & Herbicide Application' started by start2finish, Jun 24, 2008.

  1. start2finish

    start2finish LawnSite Senior Member
    Messages: 497

    Ok, I have a acre or so pond and I have surface algae I need to get rid of. I am located in central NC. the weather for the last month was two weeks of 95-98 degrees. 2 weeks of 85 or so and now creeping into the 90's again. 1/2 inch of rain last month or so. Pond level is down 5 inches. No water has been pumped out of the pond. No chemicals applied to pond or surrounding areas.

    I have about 1/2 coverage of a thick algae. It makes the fishing tough and I would like to reduce it. I am aware that I cannot kill too much of it or during this hot period the decompositon will deplete the oxygen and kill my fish, but I need to get this in check.

    any suggestions?
  2. kbrashears

    kbrashears LawnSite Senior Member
    Messages: 777

    Copper Sulfate, but you're going to have to do some homework.

    You need water volume, alkalinity, methodology, etc...

    Google it.
  3. bug-guy

    bug-guy LawnSite Bronze Member
    Messages: 1,029

    go to jdl and look at pond champs they have a 4 step program
  4. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    Assuming this is a closed pond with out flow.

    1st you have to find the volume of your pond or ACRE FEET. That is surface area times the average depth. If your pond is one acre surface area and 6 foot at the deepest point, the AVERAGE Depth might only be 3 or 4 feet because of the sloping sides. You must make the guessimate from your knowledge of the pond bottom.

    Once you have calculated the ACRE FEET of your pond, you can make correct application. 2 lb of copper sulfate per Acre Foot is standard label rate. Apply it by placing the copper sulfate in a sock of burlap bag with a rope attached to it. Drag the bag through the water so you distribute the copper sulfate evenly. Controlling the algae will not deplete the oxygen or kill fish. It is the decomposition of weeds that depletes oxygen.
  5. shaneb

    shaneb Inactive
    Messages: 34

    I would recommend This is a full service website that has excellent pond maintenance information. You can also call their 1-800 number and speak with aquatic specialists.
  6. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    I am not saying your link is a bad company. But with a little research and the knowledge of what to use, products for Aquatic can be purchased less expensive at your regular supplier.
  7. teeca

    teeca LawnSite Bronze Member
    Messages: 1,202

    what ric said.. adding that what i do is mix the coppersulfate into a slurry in a 5gal bucket, put it in a back pack sprayer and top it off with water and spray using the strait nozzel (or whatever it's called) this will one help get the mats further in the pond and also churn the water up a little. if you have a lot of algae and its been that hot and without any rain to speak of, what i do is treat no more then 1/3 of the pond, then wait a week and do the other. you can treat up to 1/2 of the pond but your pusing the desolved oxy rate. what kind of fish do you have? if you have grass carp, koe(sp?), or trout to name a few, the copper sulfate will float them within hours (kill them). if you do have these fish you can use barly straw to control the algae. adding a colorant/shade will help to reduce the algae blooms and using a fert that cantains no 'P' will also help. also when you spray the algae it will turn brown/green and smell really bad. it's dead and will continue to rest atop of the water until you or mother nature rain sinks it or you pull it out or churn it up.
  8. start2finish

    start2finish LawnSite Senior Member
    Messages: 497

    thanks, the copper sulfate was forgotten. I estimate 1.5 acre feet of water. I remember from my aquatic licensing class years ago how to do this, but couldn't remember the copper sulfate. I only have large mouth bass and bream(panfish) in the pond. Maybe a few carp would help keep things under control. I always treat the water with a dye/colorant but this hasn't stopped the problem.

    the pond is spring fed, but during the summer it falls below the standpipe and no water leaves the pond with the exception of heavy rain. It will take 3+ inches at one time to top it off. so I don't see this as a problem.

    as for the application techniques, the sock idea was interesting, I have a skid mounted sprayer for my gator, I thought of using it to direct the application to the algae itself. I have hydrilla under water, but really it serves as good fish cover, just the surface algae is bothering me. any thoughts on mechanically removing the algae or will it return?
  9. teeca

    teeca LawnSite Bronze Member
    Messages: 1,202

    if you have a skid sprayer (with good pressure and volume) that would be about the best to use. it will knock the mats down the same time your killing the algae. another option is 'cutrine' you can buy it at tractor supply. it's alot better then regular copper sulfate because it is chelated and will stay in suspension longer. want a good kick in the wallet try killing the hydrilla with 'sonar AS' $650 a pint and works great and turns ALL the plants in the pond white and kills them. takes a month or so, but it does do the trick. you can also use 'reward' (diquat) but its only good for a top kill. the grass carp ar a bad idea, and if you have a water source that connects to your pond, then you probly wont get a permit from the DNR. atleast thats what they do here.
  10. start2finish

    start2finish LawnSite Senior Member
    Messages: 497

    what a about a permit from the DNR department of Natural resources?
    I am not aware of anything regulating carp here. Or are you speaking of the treatments?

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