Re: Cleaning fresh water tank on my SM2K

James Cromie

Great source of Iron!

On Nov 6, 2020, at 09:34, CW Bill Rouse <brouse@...> wrote:

It is difficult to get you head around this but to set your expectations maybe you should try to see the inside of your local municipal water tank. Here is a real photo:

As for strange solutions, when we were at Bonaire in the Caribbean, we visited a house that was being built for some American cruising friends who had successfully immigrated to Bonaire.  Residents of Bonaire collect rainwater for their primary freshwater source. Freshwater can also be delivered by truck to the residents. Judy and I were amazed that the locals place a certain type of fish in the tanks to keep the "growth" to a minimum. I wish I could remember the name of the fish. 

CW Bill Rouse Amel Owners Yacht School
Address: 720 Winnie, Galveston Island, Texas 77550 
View My Training Calendar

On Fri, Nov 6, 2020 at 10:36 AM James Alton via <> wrote:

   We cleaned the tanks in our Maramu and they were much worse than your, in fact we even had live snails living in there!  There was also significant amount of sediment in the aft low end of the tank.  I just used the bleach version of Soft scrub and a medium deck type brush with an extension handle to clean our tank followed by lots of flushing and pumping.  I was concerned that the abrasive powder in the Soft Scrub might be abrasive so I used a portable diaphragm pump to remove the water and debris instead of the ships water system. Obviously rinse the tank from forward to aft to flush things downhill.    Maybe be a little careful with the putty knife in case you encounter some loose gel coat, some came loose on my boat just from the scrubbing.


SV Sueno
Maramu #220

On Nov 6, 2020, at 10:07 AM, David Kurtz via <Davidwkurtz@...> wrote:

Good morning all!  I tried cleaning my fresh water tank using Bill’s alternate method (fill with bleach solution, let sit for 48 hours, drain, flush, etc.) and did not get the desired results.  The attached photo shows what I am dealing with.  Seems to be a couple varieties of mold that was not killed off by the bleach solution.  Now that I am opening up all three access ports I want to clean it with something that works, but doesn’t poison my whole family 😳.  What have some of you used for cleaning?<214D1856-A9F4-4713-BDFD-CA75CE8E2004.jpeg>
Dave Kurtz
SM2 #380
S/V Celtic Cross

Detroit, Michigan

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