Hi! all see picture.
so long as input = output, there wont be any issue of unaccountable water i.e. flow of tray 1, tray 2, tray 3, tray 4 is equal to input and output.
the flow near tray 1 is fastest, tray 4 is slowest as water has to pass through 4 trays (more resistance) instead of 1 tray.i
f input is 1000l and output is 800l then the caninster will leaks... or the other way round.... caninister runs only one one pump thus input will be same as output... can left leg walks faster than right leg??? it is the average that counts...
hope this help : )