Soil Spade Ideal for smoothing out and turning over substrate. It can be especially useful in working with substrates that are light or very loose in consistency. The soil spade can also be used to remove algae from the walls of glass aquaria. Material: surgical grade stainless steel Aquarium Type: freshwater and marine Head Width: 7 cm (2.75 inches) Length: 32 cm (12.5 inches)