Is the Hanna TDS Tester Actually Worth It?
I finally picked up a hanna tds tester after realizing my old budget meter was giving me some pretty suspicious readings. If you've spent any time looking at water quality—whether for a reef tank, a hydroponic setup, or just making sure your home drinking water isn't full of mystery minerals—you've probably seen the little red or blue pens from Hanna Instruments pop up. ...