South-African reef New member Nov 26, 2012 #1 A friend gave me a hanna pH HI 98128 pen is this thing any good? It work I checked my ph and it read 8.1.
A friend gave me a hanna pH HI 98128 pen is this thing any good? It work I checked my ph and it read 8.1.
Fish_wiz2 Active member Nov 26, 2012 #2 I have never used that specific pen but with all pens, as long as you keep them calibrated, they are pretty accurate for the ease that comes with it. Wiz.
I have never used that specific pen but with all pens, as long as you keep them calibrated, they are pretty accurate for the ease that comes with it. Wiz.
