I have a bottle of Kent Marine Pro-Clear MARINE Clarifier. It is missing approximately 1 ml. I used it a few months ago when I didn't know what I was doing -- I read I needed a water clarifier and this was one of the first ones I saw, so I bought it. I didn't realize Kent makes both a saltwater and a freshwater version. Anyway, it has been opened, but is only missing about 1 ml. It's in perfect shape. I can ship it to anywhere in the country for between $3 and $5, from what I gather from USPS's website, but I think it might be cheaper if I actually go through stamps.com . So, for all you saltwater reef keepers, here's a good opportunity to get a $10 bottle of stuff for less than half. I don't know that there will be any interest, but to make it a little more fair, please put your name on a list and I'll check it at lunch tomorrow, and if there's more than one person, I'll use the RNG to pick a winner.