I have been scheming of a similar bag system for Sweet.
No need to use bleach if you stick a hose in the bag and give it plenty of fresh water. With the added advantage that living alongside a rainforest I could let deck water runoff keep the salinity down for me.
Bonus is extending the life of the sacrificial zincs.

        Cheers, Russ
        Sweet 35-1
east side, Vancouver Island

At 12:05 PM 09/01/2013, you wrote:
Way back in the prehistoric times (late '60's), I partnered with a friend in Southern California. We had a 'boat bath' for our Santana 27. It was a plastic tarp which set down into the water - floats all around the perimeter - a weight in the center to hold it down - open at one end with a drawstring. We would coast the boat in, get out and draw up the string, and dump a gallon of bleach into the bath. No bottom paint and no bugs..... then they decided that bleach is a no-no. End of bath.

Gary on the Chesapeake
----- Original Message -----
From: <mailto:mdeyo...@deyoungmfg.com>Martin DeYoung
To: <mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com
Sent: Wednesday, January 09, 2013 1:05 PM
Subject: Re: Stus-List Prop Mussel Farm

A local, avid Soverel 33 racer built a boat sized underwater enclosure (float at top, weighted at bottom) into his Shilshole Bay Marina slip. After a race he will pour a little bleach into the enclosure to reduce marine growth. I’m not sure if the bleach or if the controlled environment (less light and nutrients) is the more effective element of this strategy.

Getting in and out of the enclosure is troublesome but he swears by the effectiveness. Based on his light air racing success he may be on to something.

Martin
Calypso
1970 C&C 43
Seattle

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bill Coleman
Sent: Wednesday, January 09, 2013 8:15 AM
To: cnc-list@cnc-list.com
Subject: Re: Stus-List Prop Mussel Farm

Here in Erie When the Zebra Mussels first came on strong, they were a huge problem for the water authority, now the inject Chlorine at the intake, then remove it with carbon at the plant, at least that is my understanding of it. Chlorine is something I don’t mess with anymore. I put a pellet in my Shurflo refrigeration strainer and it ate the 316 SS 50 micron mesh right up! Now I use Moth Balls. They don’t allow any growth in the strainer, but unfortunately they do allow the fry to pass downstream. I would suggest grinding up moth balls into a powder and mixing them up into your favorite bottom paint. May not work, but –
 it can’t hurt,
there’re inert!

Bill Coleman
C&C 39
animated_favicon1



Martin,

In answer to your last question, What do the local power generation and
utilities use to keep intake and discharges clear?

The answer is divers!!  Nothing else will keep some intakes clear, no matter
what coating or treatment is used.

Jake

Jake Brodersen
C&C 35 Mk-III
Midnight Mistress
Hampton VA



-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Martin
DeYoung
Sent: Monday, January 07, 2013 8:18 PM
To: <mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com
Subject: Re: Stus-List Prop Mussel Farm

I suspect that the broad difference in prop anti fouling coating performance
relates to the way sea creatures attach to the prop.

Here in the PNW, at Shilshole Bay Marina, barnacles are the problem not
mussels.  Even when the zinc paint is wearing out a light brush will remove
any that remain after applying power to the prop for a few minutes.

The zinc paint seems to kill the barnacles or at least prevent them from
attaching to the coating.

IIRC mussels attach with a self created fiber.  Barnacles seem to grow onto
the substrate with a softer foot or base which may be easier to poison.

What do the local power generation and utilities use to keep intake and
discharges clear?

Martin
Calypso
1970 C&C 43
Seattle


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