FDF Neptune Plus Challenge Fluid RowerExperience the sight, sound and feel of on water rowing with the Neptune Plus Fluid Rower. Featuring a new and improved tank, the Plus boasts four levels of manual adjustment, made easier thanks to the new audible and tactile selector dial. A redesigned valve provides more accurate and even levels of adjustment, creating significantly greater Fluid Force at maximum resistance by putting more water into the impeller tank when needed. Bright yellow