Kodak Photo-Flo 200 16oz (473ml)

Finally got streak-free negatives after struggling with tap water spots for months—this wetting agent makes the final rinse step actually effective. A little goes a long way in the diluted solution.

I was worried about mineral streaks ruining my last roll, but a few drops mixed into the final rinse and the negatives dried completely clean. The 16oz bottle will likely outlast my entire darkroom setup.

My negatives came out spotless after using this as a final rinse—the wetting agent really cuts down on water spots. A tiny bottle goes a long way too; I've barely used any in several rolls.