Thanks for the suggestion. The idea of using a Chlorox toilet treatment tablet seems sound, but it will not work for me at present. The problem is that I currently sail on the Mississippi, and "ol' man river" smells worse than the ocean. Consequently, although I have a thru-hull to take in flush water for my head, I flush instead with a gallon bottle filled with water from the city water supply at the dock. (we carry 4-5 plastic bottles for this use.) I guess I could put a piece of that treatment tablet in each bottle as I fill it, but the automatic feature of the slowly dissolving tablet in the intake
line would certainly make it easier! Meanwhile, I shall install the filter housing on the flush water intake
line so that when I get to the Great Lakes next year, I can use that suggestion. I will use that intake then, because Lake Michigan doesn't stink! O K you Chicago sailors, don't tell me it does, I used to live near the east shore of that big puddle!