Hi All,

I bought a 5# bag of Citric Acid to use instead of Barnacle Buster to
descale my AC system not knowing if I would find it in the Caribbean or
what the cost would be.  The AC tech who is helping me suggested 2 Gallons
of BB.  Google says Phosphoric Acid (the active ingredient in BB) is the
same as Citric Acid but usually cheaper.  BB's SDS sheet says <10%
Phosphoric Acid (I assume that's by volume).

How much Citric Acid should I use per how much water to introduce into my
system?  All guesses appreciated.  Thanks.

Regards,

Jim

Jim Felds
M/Y Kokomo
Hatteras 48 LRC
US Phone: 910-352-7119
Caribbean: 590-6600-96453
Jim@Focustarcapital.com
www.LifeonKokomo.com (Blog)

Jim,

I use food grade citric acid. I pour 500 grams into my sea water strainer and close the inlet valve. Then using a hodpoge  arrangement of water hoses and the saltwater pump, I circulate until I can no longer see and of the citric acid in the strainer. Then I wait about ½ hour. Then open the sea water inlet valve and wait an hours. The mixture tends to clean both side of the valve without any additional action. Then I operate the AC FW pump for 3 minutes and stop. Wait 1 hour or even overnight and pump sea water thru everything. As I am doing this usually for winter layup, I then back fill fresh water. If in spring, I may not backfill.

All this took longer to write than do, once my two circulation hoses are attached.

Lee

MV LeeZe.

Levent Marina, Izmir Turkey

On Aug 8, 2020, at 23:34, Felds, James via Trawlers-and-Trawlering trawlers@lists.trawlering.com wrote:

Hi All,

I bought a 5# bag of Citric Acid to use instead of Barnacle Buster to
descale my AC system not knowing if I would find it in the Caribbean or
what the cost would be……