Mussel growers in Prince Edward Island (PEI) normally start treatment at
densities anywhere between 7 and 12 sea stars per collector, some even
systematically treat all collectors (B. Fortune, pers. comm., 2006; Rogers, pers.
comm., 2006; Somers, pers. comm., 2006). While they prefer hydrated lime as a
treatment to control sea stars, they have been using brine or a mixture of brine
and hydrated lime over the past three years to control green algae (Entermorpha
sp.) and sea stars when both are present. Lime treatment is discussed in the
next section.