I use the Kodak E6 one shot kit with great results. May I ask what your time is on the 1500 (I'm using the 2300)
When you state wash water, do you mean the final stab or rinse water between chems.
ALSO, very important, did you follow the mixing directions on the Kodak box exactly? i.e., x00ml of water first then chem, mix, then fill to desired amount with water, mix? Also important with the A/B dev, i.e., Water, Chem A, Mix, Chem B,Mix. You must follow these exactly.