I honestly know nothing about the Trebla stuff. As for starter, Kodak Developer does not need any to be within control or aim, but Developer/Replenisher does, and that is what I purchase as a 5 gallon kit from Adorama. My test without starter were way out, as were strips that had too much starter, and that is due to the fact that starter is used to stabalize the solution. Refrema machines are good, but only if they are used consistently and kept within guidelines.