Dual waters bottom paint ??

Sherwin Williams makes house paint, I wouldn't use anything from them on a bottom.

Seahawk, Micron. and Trinidad make bottom paint that is ok with freshwater and they all work.

Trilux should work good on your running gear and generally lasts 14 months or so IF you don't have any electrolysis.

Sherwin Williams has been in the marine paint business since the early 1900's if not longer and has a complete line of coatings from bottom paints through topside enamels and high performance fully aliphatic linier urethanes. Though not widely used or accepted in the U.S. by recreational boaters, their products are found in many of ship and boat yards around the world. You'd be surprised at what marine coatings company's / manufactures apply their labels onto Sherwin Wiliams proprietary coatings products for resale. It's safe to say that every U.S. Navy and Coast Guard vessel has Sherwin Willliams bottom coatings and topside coating systems on them

Bottom paint performance and longevity has turned into a crapshoot since the heady early days of now outlawed toxic biocides and 80% copper loads but I recon it all depends on where you keep your boat, how often it moves and the kind of equipment that your divers use when cleaning the bottom etc. Certain great saltwater coatings are rendered useless in fresh to brackish waters and I'm guessing that you're in mostly brackish water for most of the year? From what mt buddy says who keeps his down easter in the Chesapeake, He uses Pettit's Odyssey bottom paint that's formulated for brackish water and he gets a couple of years out of it and his boat moves quite a bit working traps. I'd venture to say that any ablative coating with a high copper content would be a good choice in brackish to more salty water like Interlux Micron CSC $$$ but that's another factor, the wallet pain factor .

I don't think much grows in freshwater, so bottom paint there doesn't need to be so effective, but does have to be compatible. I haven't researched which bottom paints are freshwater compatible as it's been a long time since one of the yachts I've managed has visited pure fresh water (for any time anyways). That being said Seahawk Biocop TF has been my go to bottom paint and extremely effective in South Florida/Bahamas and everywhere else, it is approved for salt, brackish, and freshwater, their Cukote is also good.

Captholli- Thanks for the information on SW paints. I always recommend to stick to brand/type of paint that the yard doing the work is accustomed to using......both for topside and bottom paint. We don't see SW paints used.

Up here in northeastern North Carolina on Roanoke Rapids Lake and Lake Gaston we have a major issue with mussel and mollusk growth where fresh H-2/0 is moving like in cooling pump intakes and outboard head cooling passages, inside plumbing-like heads, raw water strainers along with any associated hose runs associated with them especially where my local marina is on the south shore. Seems like the boats in the shade of undercover boat houses fare better than the boats on outside docks or on moorings. Yes, there's Alge and grass growth on fiberglass hull bottoms and no artificial reef systems like saltwater growth but the mollusk and mussel problems are a PIA and our lakes temps cool down into the high 30's low 40's in winter with zero effect so I can only imagine what takes place further south in warmer fresh water.

Interesting, here in South Florida we get mussels sometimes, but they don't stay stuck to anything, they are alive and fall off easily. I boat where Ralph lives at least 4 long weekends a year (St. Johns river), never noticed any crustaceans on anything (dock pilings, boats that stay in the water year round, etc.). Just a little algae.