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Old 12-29-2016, 07:30 PM   #1
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How to clean your water tank

We purchased a 2002 Nordic Tug last year. I replaced the water hose from the aluminum water tank to the electric water pump. Eight months later I look at the hose and find that the inside has a thin coating of scum in it, the color of toupe.
There is not an access hatch that you can open and inspect the inside of the tank. So my question is this. How do you clean out a 14 year old water tank?
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Old 12-29-2016, 07:35 PM   #2
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Bad water in new boat
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Old 12-29-2016, 10:00 PM   #3
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Clean Tabs Ltd | Water Purification | Water Purification Tablets | Water Tank Cleaning | Water Treatment | Drinking Water Disinfection
Warning I sell this stuff so I may be biased.
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Old 12-30-2016, 04:31 PM   #4
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Be aware that chlorine is highly corrosive to aluminum. At the very least, be careful how much you add. I'd suggest doing a test with aluminium foil in the time of exposure and concentration you wish to use.
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Old 12-31-2016, 08:32 PM   #5
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Hey, HopCar, is that stuff safe for aluminum tanks?
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Old 12-31-2016, 08:59 PM   #6
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We seem to have two threads covering the same subject. The other one has already done so in considerable detail: Bad water in new boat
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Old 12-31-2016, 09:22 PM   #7
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CaptTom, it is much safer on aluminum than bleach. In the Practical Sailor test they put aluminum discs in solutions of bleach and Purisan. The bleach solution did a lot more damage than the Puriclean.

Both use chlorine as the active ingredient but there is something in Puriclean that protects the aluminum. I asked the manufacturer of Puriclean why it didn't damage aluminum and I got a long explanation that I couldn't really understand.
He talked to me like I hadn't slept through high school chemistry.
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