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Bromide in sea strainer

Discussion in 'Beard Marine Vendor Forum' started by Silver Bullet, Oct 25, 2012.

  1. Silver Bullet

    Silver Bullet New Member

    16
    Oct 23, 2012
    Florida
    Sundancer
    Cummins
    I started a Thread about Bromide in the sea strainer to reduce growth in the lines. Does the Bromide hurt the A/C lines or unit?
    Everyone says it slows the barnacle growth, but can it hurt the equipment?
     
  2. Robski97

    Robski97 Well-Known Member

    Jan 15, 2007
    North Bellmore, NY
    44DA
    Cummins QSC 8.3's
    Ive been using Bromine Tablets for 6 years. No negitive effects. I was told it may lead to premature strainer basket failure. I have yet to experince that yet. I notice a big diffference when i forget to put the tablets in during the summer


    Rob
     
  3. rcknecht

    rcknecht Well-Known Member

    Mar 23, 2009
    toms river,nj
    340 Sundancer 2001
    T 454 MPI
    I use clorine tablets, and have not noticed any problems...
     
  4. trit21

    trit21 Active Member

    Dec 16, 2007
    Live, Orlando: Boat, Ft. Pierce
    See signature
    See signature
    Bromine and chlorine are corrosive and will eventually eat thru metal. Since it is a flowing thru the system, it may take time to corrode the internals of the AC but when I called Marine Air and asked them about it, they told me that was a big no as it will eat away at the tubing inside the AC unit itself. I have done it in the past but will put a tablet just to sit inside the strainer in the future. Just looking for problems.

    If you place a piece of copper tubing inside the strainer, this will create a copper oxide will deprive the sea water of oxygen and not allow growth to occur from what I have read and my dock neighbor has great result with that.
     
  5. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    The problem with tablets in the strainer is when the system sits idle for a while, like when the temperatures falls and your system doesn't cycle on very often or when you leave a tablet in the strainer basket with the system off or in humidity control mode. When the tablet sits in the strainer, it continues to dissolve so the water in the strainer becomes super concentrated with bromine or chlorine which are very corrosive. Some strainer baskets have plastic bottoms in them and some strainer bodies have plastic sides and lids and the concentrated chemical will eventually degrade the plastic parts and you will have to replace them. The stainless steel mesh material used in the baskets will also eventually corrode away.

    I find that it works better to just clean the system once a year with a phosphoric acid solution.
     
    Last edited: Oct 25, 2012
    kap2 likes this.
  6. Bucit

    Bucit New Member

    Mar 12, 2010
    St. Petersburg Florida
    2005 280 Sundancer
    2004 SPD-104 Achilles w/ 8hp Yamaha
    Twin 4.3 MPI's with Alpha drives.
    I use to put a bromine tablet in my stariner but found after a while it started to turn the strainer basket green (corroding it). My boat is lift kept so the AC would be shut off for a week at a time. As Frank said, if it's running and cycling all the time it may be OK but don't let it sit idle.
     
  7. Captain Allen

    Captain Allen Member

    354
    Feb 2, 2009
    Coastal North Carolina
    370 EC 1994
    454 Mercruisers, straight drives
    I use bromide with good results, although I did have to replace a strainer basket because the plastic bottom disintegrated. I attribute that to the fact that I had left the basket with bromode in it during a period when the system was not being used very much. Now, I only put the tablets in during the hot NC summer months, when the system runs nearly continuously. As Frank said, don't let it just sit there for long periods in a concentrated state.
     
  8. BMS-AL

    BMS-AL New Member

    98
    Aug 28, 2012
    Savannah, GA
    n/a
    n/a
    Silverbullet, I was told the same thing from Dometic, Scott Beard (the president of our company) and Jesse Russell (my sales manager and former technician) I would keep away from that stuff only because of the potential problems. We had a warranty claim that was denied by the factory because of this. In my view using barnacle buster (acidic) or the hammerhead descalor (non acidic, we carry in stock and safe for the units) is your best bet. I was thinking of doing another group buy with the descalor maybe this is a sign from the heavens.
     
    Last edited: Oct 25, 2012
  9. Robski97

    Robski97 Well-Known Member

    Jan 15, 2007
    North Bellmore, NY
    44DA
    Cummins QSC 8.3's
    I guess all hot tubs , pool heat pumps and alike are made of magic metals ? Come on guys . Frank has a vaild point about the duration of the off cycle. Other then that its all nonsense. Im sorry. U have a better chance of having a coil fail from electrolysis, or using those nasty acidic condensor cleaners ( when done improperly ) then bromine use. Ive never heard of a failure . Only the baskets which is what the bromine comes in direct contact suffers failure after YEARS of superconcentrated contact. Like i said 6 years on this boat four years on my old 34 dancer during the summer never had an issue. Coil failure related to this is bull !

    Rob
     
  10. trit21

    trit21 Active Member

    Dec 16, 2007
    Live, Orlando: Boat, Ft. Pierce
    See signature
    See signature
    Difference in spas, hot tubs, and pools is that you control the ph which is the amount of acid in the pool which will limit the amount your heater and metals wear. Leave the acid level high and you start replacing heaters and metals parts of the pump. Have I seen this? Yes, many times with mine and my parents hot tubs. In the case of the AC , you cannot control the ph of the water so there is wear of metals parts. Obviously it is taking longer due to thickness of metals, amount of corrosive fluid you arenpushing through the system vs amount of water, and if you don't use the bromine in cooler months it will take even longer but I bet there is still wear on the coils. If it works for you, keep doing but kind of hard to argue the corrosiveness of the water you are putting through you AC system.
     
  11. fwebster

    fwebster Well-Known Member TECHNICAL Contributor PLATINUM Sponsor

    Oct 6, 2006
    Middle Tennessee ; Panama City Beach, FL
    1996 450DA
    3116 Caterpillars
    Tom,

    He'll figure it out when that $75 Perko strainer basket comes out in bits and pieces.........and he realizes the internals of the A/C system are subjected to the same chemistry.
     
  12. Robski97

    Robski97 Well-Known Member

    Jan 15, 2007
    North Bellmore, NY
    44DA
    Cummins QSC 8.3's
    I guess we will just have to disagree !

    Rob
     
  13. BlueYonder

    BlueYonder Active Member

    184
    Jan 12, 2015
    Chesapeake Bay
    37
    QSC 8.3 600
  14. All's Well

    All's Well Active Member PLATINUM Sponsor

    907
    Jan 14, 2010
    Houston
    '12 58 Sundancer
    900 MAN
  15. Korkie

    Korkie Active Member

    868
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
    I run PineSol through mine. Just close the thru hull and pore a gallon bottle in the strainer twice a season and stays clean. Recommended by my surveyor. Use it in all my drains, ac pan, sump pump. Gets rid of all the slime etc and leaves nice scent. Wife likes the Tropical Scent.
     
  16. rcknecht

    rcknecht Well-Known Member

    Mar 23, 2009
    toms river,nj
    340 Sundancer 2001
    T 454 MPI
  17. Rocket

    Rocket Active Member

    615
    Jan 14, 2008
    Long Island NY
    2018 Sunseeker 57 Predator
    Previous: 2007 48DA, 2004 420DA, 2007 320DA, 2006 240DA
    Volvo D13 900HP Straight Drive
    Rob, what product are you using. Growth was bad this year at the dock
     
  18. Josh28161

    Josh28161 Member

    50
    Feb 8, 2020
    Deltaville
    2004 280 sundancer
    Twin 4.3
    Alpha one/gen2
    I would be scared to use bromine or chlorine as well. The copper tubing bin the a/c units is very thin. As for its use in spa’s, no comparison. Spa’s are all plumbed in pvc so it’s not a concern.
     

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