[sheffd]

In my day job as a licensed water treatment specialist, the filter set-ups sound great. With the 'String wound gradient density' filters you need to be aware that there is what is called dumping. Because of the porous nature of the filter, when it gets full it will dump to your second filter causing it to clog faster. My suggestion would be to change your 5 micron a little more frequently than your your 1 micron or even your .5. Since you don't have gauges to look at the pressure gradient from inflow to outflow you would definately need to pay attention to output flow at your cleaning nozzle. Also, keep in mind that the sprial wound filter is usually only good up to about 150 degrees. Beyond that, it starts to melt.