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Old 27-11-2019, 10:34   #1
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Join Date: Mar 2019
Location: Anacortes, WA
Boat: Cooper Seabird 37'
Posts: 35
Freshwater tank cleaning, need advice.

I have a 110 gallon aluminum freshwater tank. It's too buried to remove and replace so I'm going to live with it for as long as I can. Over the summer I cut two 8x12" holes in the top of it for access/cleaning and then sealed it back up with starboard, sealant, and lots of sheet metal screws.

Recently while sailing, I discovered that it was leaking pretty badly as a result of not sealing my holes well enough, so I applied a healthy amount of 3M 4000 which did the trick. I did notice however that just in the 3 months that it's been sitting, there were lots of mineral deposits and buildup inside the tank. Is this preventable by adding something to the tanks periodically, or do I have to open them up and scrape them manually?

Thanks for your time and consideration! I really appreciate any advice you may have.

37' Cooper Sea Bird

sailandbail is offline   Reply With Quote
Old 27-11-2019, 12:00   #2

Join Date: Jan 2017
Boat: Retired from CF
Posts: 13,304
Re: Freshwater tank cleaning, need advice.

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john61ct is offline   Reply With Quote

cleaning, water

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