This 530 Model HydroMinder with mounting bracket and siphon breaker eliminates the need for manually handling, measuring and mixing concentrated chemicals. Medium volume, with a dilution range of 4:1- 530:1 and a 9.5 GPM.Keep your reservoir ready at all times with accurately mixed solution. No pouring, stirring or waiting. When solution level drops in reservoir, float ball activates a non electric magnetic valve. The water flow through your HydroMinder siphons liquid chemical through a metering tip and automatically maintains level of ready-to-use solution. Self contained and self controlled. Easily installed.his 530 Model HydroMinder with mounting bracket and siphon breaker eliminates the need for manually handling, measuring and mixing concentrated chemicals. Medium volume, with a dilution range of 4:1- 530:1 and a 9.5 GPM.Keep your reservoir ready at all times with accurately mixed solution. No pouring, stirring or waiting. When solution level drops in reservoir, float ball activates a non electric magnetic valve. The water flow through your HydroMinder siphons liquid chemical through a metering tip and automatically maintains level of ready-to-use solution. Self contained and self controlled. Easily installed.