 TDS testing??
I installed a meter on my RO/DI system HM Digital In-line Dual TDS Meter (Saltwater Aquarium Supplies > Reverse Osmosis > Purity Monitors ) and for some reason the readings I am getting does not make sence. I put the IN probe in the red IN line coming from the water source, and the OUT probe in the white line between the last filter and the holding tank. My system is a 100 gpd with six filters. A 3 gal. holding tank and a faucet for drinking water. My IN water reads 000ppm to 65ppm, and the OUT water reads 100ppm to 150ppm. The probes have "IN & OUT" labeled on them so I thought I had them in the right hose. Do I have them backwards? or could they be mislabeled? Any thoughts,,Thanks _________  90 gal AGA,main,, 40,gal, sump/refug,aqua ev 120 skimmer, mag-5 pumps x2,, hydor koralia 3 circulations pumps x2,, sunpod 300w MH,, current extreme T5 14,000+super actinic 460,, 110 lb. DSB, 100 lbs. LR | 
