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09-27-2018, 04:51 AM
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#1
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Senior Member
City: marco island
Join Date: Apr 2012
Posts: 109
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Bromine taps in raw water strainers good or snake oil
My friend who also owns a Mainship puts Bromine Taps in the Raw water strainer bowl for both his AC and Generator strainers. He think it could cut down on potential growth in the cool system lines.
What do you think. To me I would think it would make little difference??
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09-27-2018, 06:35 AM
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#2
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Guru
City: Fort Myers, FL... Summers in Crisfield, MD
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 9,970
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Yes, it does cut down on marine growth (used it in my AC system). I became concerned with that it might be corroding the condenser coils and stopped using them. I found shutting down the AC units, closing the seacock and running a dehumidifier for a few days worked better. Closing the seacock shut off the flow of water with oxygen. When the water was depleted of oxygen, the marine organisms died. The dehumidifier kept the humidity in the boat below 50%.
Ted
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09-27-2018, 07:09 AM
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#3
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Guru
City: Chicago/Montrose Harbor
Vessel Name: Sea Jay
Vessel Model: Non Trawler ;-) Ask me if it matters LOL
Join Date: Jun 2016
Posts: 507
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If you put them in the strainer that supplies the Head, does it also kill the stink that grows between uses?
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09-27-2018, 09:33 AM
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#4
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Guru
City: Full Time Cruising East Coast
Vessel Name: Meridian
Vessel Model: Krogen-42
Join Date: Aug 2011
Posts: 1,016
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I use copper plumbing fittings from the hardware store. A couple in each basket
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Terry
Meridian
KK-42097
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09-27-2018, 10:05 AM
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#5
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,787
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Ya know... I am not criticizing any of the members that post this, but I have seen both of these claims of bromine and copper fittings many times on this forum. I'd love to see some actual testing and science applied to these, and maybe some other, solutions some day (unless there is some that can be pointed to). It feels both legit... AND... a little old wive's tail-ish.
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2000 Navigator 4200 Classic
(NOT a trawler)
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09-27-2018, 10:23 AM
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#6
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Guru
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 22,729
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I would imagine for some boats and sometimes it works...thus the stories.
I can't imagine that someone hasn't marketed it if there was more than s shread of evidence of it working.
Can't believe the ultrasonic people aren't on it, surprised the bottom paint people aren't selling a strainer paint, can't believe someone isn't all over it, let alone proving/marketing any of it.
I stick with cleaning it occasionally until I see some evidence show it works more often than anecdotally.
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09-27-2018, 11:26 AM
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#7
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TF Site Team
City: Westerly, RI
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 2,750
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Moved from the "Marlow - Mainship" to "General Discussion" sub-forum as this is not a brand specific subject.
I can see the potential benefits of bromine, it requires water rushing over it t dissolve the tablets, and works well in hot water. I suspect sitting in a strainer can achieve that. I assume it would work as well preventing growth in a cooling system as it does in a hot tub/spa.
Copper's natural resistance to bacteria is why it is frequently used in door handles and push plates on doors. It has been a proven biocide for anti-fouling. However, I am curious about whether copper fittings can leach sufficient amounts of copper to be effective.
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09-27-2018, 03:50 PM
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#8
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Guru
City: Maryland
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 5,362
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Quote:
Originally Posted by meridian
I use copper plumbing fittings from the hardware store. A couple in each basket
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Me too, at least in the AC strainer basket, for about the last 3 years. Don't seem to notice much in the way of marine growth, anymore... but that might just be coincidental.
Doesn't do anything for silt, mud, weeds/grass, etc. of course.
-Chris
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South River, Chesapeake Bay
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09-27-2018, 04:09 PM
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#9
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Guru
City: Here
Join Date: Sep 2012
Posts: 2,946
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The science has already been done. Google "bromine copper corrosion" or this paper
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09-27-2018, 08:18 PM
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#10
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 2,153
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Bromine is naturally in salt water. I would think marine organisms would be somewhat immune to it. As a sanitizer, bromine tablets dissolve much slower than chlorine. The tablets last a long time in a pool system. I wouldn't think there would be enough bromine, given the volume of water a salt water pump moves, to kill anything.
When I cruise, I try to anchor and spend some time in river mouths to flush my engines exchangers and plumbing with fresh water.
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09-27-2018, 09:41 PM
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#11
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Grand Vizier
Join Date: Jan 2010
Posts: 3,463
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FWIW, when you put Bromine tablets in sea water, you get bromine gas bubbles. I did an experiment with aluminum foil immersed in sea water with hot tub tablets added. The aluminum had holes eaten in it. Bromine gas in the form of methyl bromide is great stuff if you want to sterilize a field because it kills everything.
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