• Rhinox Glass Drop Checker Kit with pre-Mixed 4dKH & pH Reagent, 3-Minutes' Setup, 3 Seconds to Read Result, Color Change Reflects CO2 Level KWD 4
• Rhinox Aquarium Airline Tubing Set, DIY CO2 Diffuser Kit, 6-Feet Airline Tubing, 2 Air Stones and Check Valves, 4 Connectors, 6 Suction Cups KWD 2.500