This ATO (Auto Top Off) Lid is designed to convert your Marineland 5.5 gallon glass aquarium into an ATO reservoir. It is made of 1/4" high-quality cast acrylic and includes a cut out for wiring and hoses. While it is recommended to attach the lid to the tank with glue, it is not necessary for its function.
Custom cut holes are also available upon request. Please note, that the aquarium pictured is not included.
