Hello everyone, I'm new to film photography and i'm trying to develop my film at home but without good results. Every time i develop a roll of film i end up with white spots all over the photo. I've attached an example of my last developement. Developed a roll of 120 Ilford Delta 100 on a Paterson tank with the turning stick, Ilford DD-X 1:4, 20 ºC 12min | Ilford Stop Bath 1min | Ilford Rapid Fixer 7min | tap water for the final rinse and Kodak photo-flo at the end. Can anyone give me some ideas on what this can be? Thanks in advance.