Woot...I'm glad to hear it I just got done calibrating the tester and it was dead on in almost every category...to be honest I was amazed at how close it was able to peg ppm it was within 10ppm of the 1382 calibration solution every time I checked it after doin a few things with the tester...

here's some of the basic info on readings

The ph in my tank is at 5.85 and it does seem the accuracy is within .05 according to the solution tests

I found that my tap water is 190ish which is pretty high I think 200 is hard water and it's just over 100 when coming out of the britta so I'll keep using that just to keep th extra ppm out

The biggest thing is gonna be seein if the ppm is going up or down it would be awesome to know whether to give them more food or not cause after almost nuking them the last time I've been afraid to push the limit again...I'm assuming that an undernuted plant will take more nutes out and leave the res at a lower ppm and if it stays about the same it's probably eating just as much as it's drinking I'd assume maybe just a tiny bit more food than it drinks would be ideal cause ya know it's getting atleast as much as it wants to eat someone chime in if my reasoning is off ;-) ttyl