Directional Flow Tank

Primary tabs

Project Type: 

Students Involved:

Tim Broderick UNH - Department of Biological Sciences
Tyler Sylvester UNH - Department of Molecular, Cellular & Biomedical Sciences

Faculty Advisors:

Edwin Grosholz UNH - Department of Biological Sciences

A directional flow tank was developed to provide a small scale, moderately priced, functional tool for aquaculture research. The design represents a prototype of a system in operation at a large commercial aquaculture facility. Tank performance was evaluated by measuring flow velocities to determine the current generating capabilities of this system. Surface velocities measured in over a depth range of 60 cm ranged from 5.1 cm/sec at the surface to 2.0 cm/sec near the bottom. The growth rates of a common fouling organism, the colonial tunicate, Botrylloides sp., were measured throughout a two-week study in the tank system. We found consistent growth rates throughout the tank system with linear growth rates as high as two mm/day, which are consistent with limited data from field populations. These results suggest that this directional flow tank represents a successful and effective model for the culture of sessile marine organisms by combining a mechanically simple design that is flexible, compact and cost efficient.


Available from the National Sea Grant Library (use NHU number to search) or NH Sea Grant


  • Directional flow tank (1998). Tim Broderick and Tyler Sylvester. Advisor: Ted Grosholz.