Micron CSC (green) Ablative, Bahamas, mask & snorkel. Not much growth at all, I do clean it every month or so, a little bit of fuzz if the boat sits and some scum on the waterline. I've used Scotch-brite scrubbing pads, usually the big maroon ones, and lightly scour, this is the best so far. I've used a terry towel, I liked that as it took the most junk off with the least amount of paint removed, but it gets thrown away with all the paint on it. And nylon brushes - too abrasive, takes too much paint off, and you're swimming in the stuff. I saw this 3M pad w/handle in Defender (light, medium & coarse) for $4 that looks handy. I might give that a try. What works for you ? Thanks, cheers, John