コダック プロフェッショナル ウェッティングエージェント 200（Photo-Flo 200 溶液）（16オンス）- 1464510

The 16 oz bottle lasts forever since you only need a few drops per tank. My last few rolls came out crystal clear with zero streaks or water spots, even after a hard-water rinse.

A single drop of this in the final rinse water is all it takes, and my negatives come out spot-free every time. I was surprised how much easier it made drying the film without those stubborn water spots.

The 16 oz bottle lasts through a ton of rolls since you only need a few drops per tank. My negatives come out streak-free after the final wash, and it really does cut down on those stubborn water marks.