Ammonia Remover Filter Foam Sponge Sheet for Aquarium/Fish Tank or Pond

The Finest Filters Ammonia Remover Foam Sheets are ideal for ammonia removal in aquariums and ponds alike This sheet measures 45 x 25cm (18" x 10"), and are approximately 12mm thick. This sheet can be cut down to size with scissors to fit most internal, external and sump filters. This foam is designed to remove Ammonia from the aquarium water. Ammonia is toxic to fish, and high levels should be addressed immediately.