6x Magenta Mystery SnailsThey are 2-4cm  but they do grow very quickly, and the females can get to the size of a golf ball.They will eat most left over fruit and veg, also will clean up any uneaten fish food, helping with water quality.If you haven't had them before, I recommend you watch a Youtube video on the care, but I find them very easy.Snails also require Calcium, to maintain healthy shell, you can add a cuttlebone, coral chips, or buy calcium blocks off Ebay, to achieve this.Please drop...