Carl thanks for the reply! Also, I was just assuming all the black floaties in the watery fuel I was draining was algae. I'll certainly take your advice for future use, but this time around, being that the boat is still at the boatyard out on an island and difficult to get to, I elected to go the "call the boatyard" route. I've been pleased with their responsiveness and have no doubt they'll do it properly. I'm just worried, as Ebb mentioned above, what the final invoice will look like...