This Hard-working Aquatic Remains Underwater Releasing All-important Oxygen For A Wild Range Of Pondlife. It Can Grow In Water 3m (10ft) Deep But Is Best Introduced To Shallower Water To Establish Gradually.delivered To You As A Bunch, Simply Place Into Ponds Where They Will Provide Shelter For Pondlife Such As Fish & Slug-eating Amphibians & A Useful Egg-laying Site For Algae-removing Pond Snails.a Perennial Aquatic, It Lays Its Roots In Silt Or Organic Matter At The Bottom Of Ponds & Each Year Re-grows Oxygenating Feathery Green Stems.delivered As 3 Weighted Bunches.