I have the World Chem shampoo system (dogs.com used to sell it, similar to Bathpro) and I'm thinking it isn't working as well as it used to after 6 years. I recently hooked up the Espree Bright White to it and my groomers are complaining the mixture isn't correct, now I've got it down to a 8:1 dilution rate. But I'm thinking could it be the Espree Bright White is too thick for the system? Any thoughts you have would be appreciated.