The only clean bottoms I saw in the Caribbean were coated with TBT product -- now outlawed in most places. Most of the high end legal products will permit the accumulation of aquatic "stuff" that needs occasional cleaning.
If you're doing a long stent in the tropics with legal antifouling, I recommend acquisition of a means of getting under your boat for an hour or more every few months.
I used Micron Extra in the Caribbean and Panama and it didn't keep all the critters away. Every month or so I needed to get out a putty knife and a brush and get under the boat to do away with various marine growths and barnacles.
Last edited by billyruffn; 04-29-2009 at 10:54 PM.