Fangrui Product Details 36/72pcs Carbon Dioxide Tablet Aquarium Accessories Co2 Tablet Water Grass Growth Fertilizer Fish Tank Accessories Pet Supplies Description: Using The New Formula And Technology, Carbon Dioxide Tablet Is Free From Toxin, Pollutions And Suspended Substance. The Tablet Release Carbon Dioxide Slowly Into The Water,supply Water Plants Right Amount Of Carbon Dioxide And Do Not Affect The Fish Absolutely. Kindly Note That This Tablet Does Not Release Bubble In The Water. It Will Just Melt Slowly And Give Out Co2 For The Water Plant. Method Of Use: Different Parts In The Tank. (the Use Of The Proposed Methods Is The Co2 Into The Filter Used Together) Usage: Every 40 Liters Of Water Into The 2 Slices, Add 2 Times A Week Package Size(l*w*h):10.5cm X 7cm X 3cm/3.9'' X 2.73'' X 1.17''(approx) Color:white Quantity: 1 Box(36pcs) Specifications: Using The New Formula And Technology Carbon Dioxide Tablet Is Free From Toxin, Pollutions And Suspended Substance. It Will Just Melt Slowly And Give Out Co2 For The Water Plant. Package Included: 1 Box(36pcs) Notes: Due To The Difference Between Different Monitors, The Pictures May Not Reflect The Actual Color Of The Item. Compare The Detail Sizes With Yours, Please Allow 1-3cm Error, Due To Manual Measurement. Please Leaving A Message Before You Give The Bad Feedback, If The Products Have Some Problems. Thanks For Your Understandings.