Gralara Glass Drop Checker CO2 Tester for Aquarium Tanks with 15 Ml of Liquid

• Aquarium Dioxide Glass Drop Checker with 15 ml Monitor .
• Concealed glass groove to and fill into .
• represents concentration of CO2.
• d with monitor which directly dropped into and use.
• BLUE means that CO2's concentration is too GREEN means it is . YELLOW means that CO2's concentration is too high, excessive CO2 may cause to die of deficiency.

Description: - Aquarium Dioxide Glass Drop Checker with 15 ml Monitor . - represents concentration of CO2. - BLUE means that CO2's concentration is too GREEN means it is . YELLOW means that CO2's concentration is too high, excessive CO2 may cause to die of deficiency. - Concealed glass groove to and fill into . - d with monitor which directly dropped into and use. Specification: - Material: Glass - : 15ml - Suitable For: Longterm ing - Size: 115x115x40mm / 53x53x1.57inch Includes: - 1 - 15ml Monitor