Kevin, you need 1.5 liters to develop two spools. -Pip At 15:31 +0000 4/11/11, Kevin Timmins wrote: >Secondly, I poured one litre of water (I'll be using a 1ltr kit) >into my developing tank just to make sure the water would cover both >spirals. NO WHERE NEAR! In the bottom of my tank there was a little >plastic