Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Coontail vs Pondweed

I have a .45acre pond with a 6ft avg depth that has both Coontail and Pondweed. I put four Grass Carp in it, and they did a number on the pond weed but not the coontail. What can I use on the Coontail that wont kill the Pondweed? My Grass Carp are huge now so Ill be replacing them.

Following this discussion...We are addressing increased aquatic plant growth this year in a 54 acre, clear water lake. Instead of coontail, we believe ours is Chara due to garlic odor. Other growth includes Watershield, American Pondweed, Slender Naiad, Bladderwort. Grass Carp should help with all but Watershield, which we will manually rake.

What species of Pondweed?

American Pondweed

Much rather have A. Pondweed over Coontail.

GC are selective which you've learned - and coincidentally sucks since per Eric AMPW is considered a beneficial species vs. coontail and happens to be a preferred forage. The risk you may now be facing, despite your best intentions with biological management with GC stocking, is monoculture of coontail. Initially at least you have AMPW competing with the coontail...sorry to be a bummer. Consider removing your GC and hope the AMPW grows back is an option.

I have coontail present in all 7 of my ponds - started in one, got transferred by [I'm assuming Canada Geese and/or ducks] to the other ponds. There's nothing I figure I can do but pray my beneficial species continue to compete with the coontail. If I hit with fluridone I'm going to nuke all my beneficial species along with the coontail - leading to major nutrient loads and potenital water quality issues to deal with. I've successfully spot treated coontail in the past with Aquathol Super K granules which worked great, but it's expensive and IMO a useless exercise as the coontail just kept coming back in other areas.

Manual removal of Coontail is tough work and won't get rid of it but it could give you some relief and the A Pondweed time to regrow (absent the GC).

I am having issues with what I think is coontail, I may need to take a closer look, I was planning on adding more GC to try to control it but it sounds like that might not have much effect on it.

I havent heard of the spot treatment of Aquathol that TJ talked about, I may have to look at that option, most of the pond is too deep for coontail to grow, I think but a couple of shallower coves are almost getting unfishable because of the stuff.

And it is a pretty good sized pond so treating the whole thing would be a huge cost.