These Pond Cover Sheets are fantastic for covering your pond in cold weather as they will insulate the pond & help it to retain heat which in turns helps to keep your fish safe in the winter. The cover sheets are also great for stopping leaves & other debris from falling into the pond. Guaranteed to remain waterproof & rot proof for 18 months Green colour to blend in to your garden Easy to install; simply peg into the ground through the eyelets in the sheet or weigh down at the edges with rocks 7 sizes available online; larger sizes available give us a call for details To prevent your pond cover collecting water when it rains why not also ?