I-690 Aquarium CO2 Drop Checker Indicator Long Term Monitor Real Time Test

Specification: Material: Plastic + Acrylic Color: Green+White Size: (Dia.)X(H) 2X5.3cm /0.79"X2.09"(appr.) CO2 Tips: Yellow-green display: excess Green display: normal Blue display: deficiency Features - All-round CO2 long-term monitor - Acrylic material, clearly reflecting the correct color - Special structural design, test agent will not overflow - Long-term monitoring of CO2 concentration in aquatic tanks - Stick the product to the aquarium glass, observable at any angle - Electrostatic paste color card, waterproof and easy to paste, reusable Usage: 1. Open the white cover, drip 1cc drops of reagent, closer the back cover 2. Cutting down 3. Vertically fixed in the tank 4. Put the sticker on the corresponding place of sucker outside the fish tank 5. Change the reagent every two weeks or after changing the water Package included: 1 Pcs CO2 Checker