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Old 07-08-2017, 02:37 PM   #21
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For the past 5 years we have found that a piece of heavy copper wire from Romex cable, about a foot long and wound in a spiral and dropped into the basket, has kept our intakes, engine and AC and generator, free of growth on the Chesapeake summers and FL winters. Previously we had barnacles and other growth in the intake strainers
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Old 07-08-2017, 04:31 PM   #22
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The same growth that is bothering your AC system.
The water flow rates are way different. Too much, too fast in engines to get much growth going. Assuming its actually used.
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Old 07-13-2017, 04:07 PM   #23
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Same experience with bromine tablets. For several years have put a small copper fitting, purchased at Home Depot, into strainer and it works great. Similar effect to copper bottom paint for growth.
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Old 07-13-2017, 05:57 PM   #24
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I have used Bromine tablets and a small piece of copper pipe. Both work great. North east Florida is the same, growth is a problem. I have not had any adverse effects.
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Old 07-13-2017, 06:47 PM   #25
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Diflecting the water from hitting the hull wasn't my concern. I'm concerned about what the bromine might be corroding in my AC system.

Ted
That's my concern as well and is the reason I asked about the manufacturer's recommendation. Nobody answered that.
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Old 07-13-2017, 08:25 PM   #26
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bromine and chlorine are both oxidizers.. why would they leave a stain?
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Old 07-13-2017, 11:21 PM   #27
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Tried them and ate up my strainer in two applications, have heard small piece of copper works , but have not tried.
Pour chlorine into sea water and you get chlorine gas. Put bromine tablets in sea water and you kill algae but also get bromine gas. Both eat metal, but I guess on the plus side, the algae is dead. There was a thread on this subject a couple of years ago and the use of bromine tablets to clean a/c systems was staunchly defended, but your experience illustrates why it may not be a great idea. People do dumb things all the time and once they do them, frequently defend them, then recommend them to others, but chemistry is chemistry.
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