pH Pens by Hanna Part:Calibration Solution 10.01 pH woven Dacron® material that will

woven Dacron® material that will last for years

but hard to find

Removes colors and odors from aquariums and pollutants that mechanical and biological filtration leave behind

Polyethylene

pH Pens by Hanna Part:Calibration Solution 10.01 pH woven Dacron® material that willThese easy to use pH pens from Hanna Industries are waterproof and will float. They feature automatic shut off, temperature compensation, replaceable electrodes, hold function, stability indicator and temperature readings in either C or F . Choose pen with sensitivity in tenths (98127) or hundredths (98128). Pens weigh only 3 oz, measure 7 l x 2 w. Use four 1. 5 V button cell batteries (included). Calibration solutions sold separately.