Tunze 5002.250 Storage Container 7.1 gal..Container with a contents of 27 l (7.1 USgal.); large cover opening to facilitate topping up and cleaning.
Size for an open 600 l (158 USgal.) tank: fill lasts for approx. one week, diam. 34 x 43.5 cm (13.3 x 17.1 in.).