I just developed a few more E-6 rolls. This time I used a 4 reel tank and 500ml of solution. Previously I was using a 2 reel tank and 350ml. Film was Provia 400X The slides came out great except almost all of the photos had at least one tiny colored pinhole in them. When viewed with my 8x loupe, I could see the tiny purple (M+C?) or green (C+Y?) dots. Any idea on what is causing them? How do I make sure it doesn't happen again? Thanks.