We have recently moved house. In our last home the water was full of impurities, and film developing was impossible. Negatives were destroyed with multiple little white flecks. Eventually I just gave up. 

On Saturday I thought, to while away an hour or two, I’d look through my old darkroom kit and see what was still usable. I found an unopened bottle of Fotospeed developer, (use by 11/2011). It was the colour of black ink, so it was disposed of.