How to use:
Add 1 tablet for each 194 square cm of gravel surface area. To work out the surface area of your tank's gravel, simply multiply your tank's width (front to back) by its length (side to side). Then, divide the result by 194 to calculate how many tablets you will need. For example, the calculation for a 30cm wide by 40cm long tank would be 30 x 40 = 1200, so then 1200 / 194 = 6.18 Tablets.
