CUTICATE Aquarium CO2 Glass Drop Checker Long Term Monitor

Description: - Aquarium CO2 Monitor Carbon Dioxide Glass Drop Checker. - Different color of liquid represents different concentration of CO2. - BLUE means that CO2's concentration is too low. GREEN means it is normal. YELLOW means that CO2's concentration is too high, excessive CO2 may cause fish and shrimp to die of oxygen deficiency. - Concealed glass groove is easy to open and fill into liquid. - Note: Liquid is not included. Specification: - Material: Glass - Liquid: 15ml - Suitable For: Long-term CO2 monitoring - Size: 115x115x40mm / 4.53x4.53x1.57inch Package Includes: 1 X Glass CO2 Monitor 1 X 15ml Monitor Liquid