Apera GroStar GS4-P 6-in-1 pH, EC, ppm & ORP Combo Pen Tester Kit Gen II | Hydroponics water quality equipment providing superior stability and flexibility M10080B Replace membranes regularly to replacement cuvettes

providing superior stability and flexibility for laboratory and field testing environments

simply replace it instead of buying a new tester

Featuring high-quality fittings that ensure a leak-free experience

the NuvoH2O RV system tackles the full spectrum of water quality issues RVers face: hard water scale

remote installations

Apera GroStar GS4 P 6 in 1 pH, EC, ppm & ORP Combo Pen Tester Kit Gen II Hydroponics water quality equipment providing superior stability and flexibility M10080B Replace membranes regularly to replacement cuvettes providing superior stability and flexibility for laboratory and field testing environments simply replace it instead of buying a new tester