Joe:(posted 8600 days ago)I can't suggest any developing times for your night shots. I'm not familiar with the Sprint film developer. When it comes to developing film in the larger tanks, you can have problems agitating them rapidly enough just because of their size. I usually agitate my smaller tanks 5 secs every 30 secs, but with the larger ones, I agitate 10 secs every minute and increase my developing time 10%. That should at least give you a starting point.