Anyone that has cruised on the Eastern ICW has dealt with the "Sound Brown", "The Mustache". Fancy books say that the stain is from the acid of decomposing organic material in the water. Boat stores sell lots of products that claim to remove the stain without damaging the hull. A friend suggested using a common product found at your neighborhood hardware store.
I gathered up a plastic storage tote, the deck brush, garden hose, a small bottle of Joy dish soap, and a bottle of Sno Bol Liquid Toilet Bowl Cleaner.
It was as easy as filling the tote about half way with water, then pouring in the Joy and Sno Bol. Mix it with the deck brush. Starting at the bow, I scrubbed from fore to aft. By the time I scrubbed my way back to the transom, the mixture had accomplished it's magic. Using the hose, the brown soapy bubbles washed away leaving a beautiful white.
*Caution* If the boat is on the hill it will discolor the bottom paint if you are not quick enough in washing off the hull.
Thanks Alex and Seng for the tip!
Thanks for Visiting,