1) Readjust the water injection pump back to full pressure.
2) For my particular setup (20psi max boost) if I want to effectivly reduce the amount of water going in the engine I should set the max pressure pot on the variable controller greater than 20 psi. If I understand this correctly the controller is basically varies the voltage going to the pump so if I set it to a value higher than my current boost setting the pump will never reach its max capable pressure.