UP Aqua 4-in-1 CO2 Atomizer

UP Aqua 4-in-1 CO2 Atomizer All-in-one diffuser, check valve, bubble counter, and has replaceable ceramic disc CO2 atomizer Note May produce large bubbles during the first few hours, will go back to normal (diffuses fine bubbles) after a while Instruction of use 1)Attach diffuser to your pressurized CO2 system 2)Bubbles will start to appear after few minutes 3)May produce large bubbles during initial use, will back to normal after few hours