Vspeck knows the name of the TDS meter we used but our tap was showing 34 ppm out here in NoCo. Not sure if it's 100% accurate though. I use only RO until I hooked up this new sump, I added another 30 gals of tap that had been sitting in a trash can for about 3 days and was perfect. Now after doing that I have lost 2 fish so far and I believe another is on the way. I'm not sure if was due to the tap, but is the only thing I can think because my water tests just fine.
Kh-10
Ph-8.4
ammonia-0
nitrites-0
nitrates-15
I do have an algae outbreak in one of my tanks and I heard that they can hide your nitrates so I'm puzzeled as to the loss of my fish right now. I'm wondering if my nitrates are higher than what the test is showing.